学生成绩管理代码.docx
《学生成绩管理代码.docx》由会员分享,可在线阅读,更多相关《学生成绩管理代码.docx(14页珍藏版)》请在冰点文库上搜索。
学生成绩管理代码
#include"stdio.h"
#include"string"
/*定义学生结构体*/
structStudent
{
charID[20];
charName[20];
floatMark1;
floatMark2;
floatMark3;
floatAverage;
};
/*声明学生数组及学生数量*/
structStudentstudents[1000];
intnum=0;
/*求平均值*/
floatAvg(structStudentstu)
return(stu.Mark1+stu.Mark2+stu.Mark3)/3;
}
/*通过学号返回数组下标*/
intStudent_SearchByIndex(charid[])
inti;
for(i=0;i{if(strcmp(students[i].ID,id)==0){returni;}}return-1;}/*通过姓名返回数组下标*/intStudent_SearchByName(charname[]){inti;for(i=0;i{if(strcmp(students[i].Name,name)==0){returni;}}return-1;}/*显示单条学生记录*/voidStudent_DisplaySingle(intindex){printf("%10s%10s%8s%8s%8s%10s\n","学号","姓名","成绩","成绩","成绩","平均成绩");printf("-------------------------------------------------------------\n");printf("%10s%10s%8.2f%8.2f%8.2f%10.2f\n",students[index].ID,students[index].Name,students[index].Mark1,students[index].Mark2,students[index].Mark3,students[index].Average);}/*插入学生信息*/voidStudent_Insert(){while(1){printf("请输入学号:");scanf("%s",&students[num].ID);getchar();printf("请输入姓名:");scanf("%s",&students[num].Name);getchar();printf("请输入成绩:");scanf("%f",&students[num].Mark1);getchar();printf("请输入成绩:");scanf("%f",&students[num].Mark2);getchar();printf("请输入成绩:");scanf("%f",&students[num].Mark3);getchar();students[num].Average=Avg(students[num]);num++;printf("是否继续?(y/n)");if(getchar()=='n'){break;}}}/*修改学生信息*/voidStudent_Modify(){//floatmark1,mark2,mark3;while(1){charid[20];intindex;printf("请输入要修改的学生的学号:");scanf("%s",&id);getchar();index=Student_SearchByIndex(id);if(index==-1){printf("学生不存在!\n");}else{printf("你要修改的学生信息为:\n");Student_DisplaySingle(index);printf("--请输入新值--\n"); printf("请输入学号:");scanf("%s",&students[index].ID);getchar(); printf("请输入姓名:");scanf("%s",&students[index].Name);getchar(); printf("请输入成绩:");scanf("%f",&students[index].Mark1);getchar(); printf("请输入成绩:");scanf("%f",&students[index].Mark2);getchar(); printf("请输入成绩:");scanf("%f",&students[index].Mark3);getchar(); students[index].Average=Avg(students[index]);}printf("是否继续?(y/n)");if(getchar()=='n'){break;}}}/*删除学生信息*/voidStudent_Delete(){inti;while(1){charid[20];intindex;printf("请输入要删除的学生的学号:");scanf("%s",&id);getchar();index=Student_SearchByIndex(id);if(index==-1){printf("学生不存在!\n");}else{printf("你要删除的学生信息为:\n");Student_DisplaySingle(index);printf("是否真的要删除?(y/n)");if(getchar()=='y'){for(i=index;i{students[i]=students[i+1];//把后边的对象都向前移动}num--;}getchar();}printf("是否继续?(y/n)");if(getchar()=='n'){break;}}}/*按姓名查询*/voidStudent_Select(){while(1){charname[20];intindex;printf("请输入要查询的学生的姓名:");scanf("%s",&name);getchar();index=Student_SearchByName(name);if(index==-1){printf("学生不存在!\n");}else{printf("你要查询的学生信息为:\n");Student_DisplaySingle(index);}printf("是否继续?(y/n)");if(getchar()=='n'){break;}}}/*按平均值排序*/voidStudent_SortByAverage(){inti,j;structStudenttmp;for(i=0;i{for(j=1;j{if(students[j-1].Average{tmp=students[j-1];students[j-1]=students[j];students[j]=tmp;}}}}/*显示学生信息*/voidStudent_Display(){inti;printf("%10s%10s%8s%8s%8s%10s\n","学号","姓名","成绩","成绩","成绩","平均成绩");printf("-------------------------------------------------------------\n");for(i=0;i{printf("%10s%10s%8.2f%8.2f%8.2f%10.2f\n",students[i].ID,students[i].Name,students[i].Mark1,students[i].Mark2,students[i].Mark3,students[i].Average);}}/*将学生信息从文件读出*/voidIO_ReadInfo(){FILE*fp;inti;if((fp=fopen("Database.txt","rb"))==NULL){printf("不能打开文件!\n");return;}if(fread(&num,sizeof(int),1,fp)!=1){num=-1;}else{for(i=0;i{fread(&students[i],sizeof(structStudent),1,fp);}}fclose(fp);}/*将学生信息写入文件*/voidIO_WriteInfo(){FILE*fp;inti;if((fp=fopen("Database.txt","wb"))==NULL){printf("不能打开文件!\n");return;}if(fwrite(&num,sizeof(int),1,fp)!=1){printf("写入文件错误!\n");}for(i=0;i{if(fwrite(&students[i],sizeof(structStudent),1,fp)!=1){printf("写入文件错误!\n");}}fclose(fp);}/*主程序*/voidmain(){intchoice;IO_ReadInfo();while(1){/*主菜单*/printf("\n------学生成绩管理系统------\n");printf("1.增加学生记录\n");printf("2.修改学生记录\n");printf("3.删除学生记录\n");printf("4.按姓名查询学生记录\n");printf("5.按平均成绩排序\n");printf("6.退出\n");printf("请选择(1-6):");scanf("%d",&choice);getchar();switch(choice){case1:Student_Insert();break;case2:Student_Modify();break;case3:Student_Delete();break;case4:Student_Select();break;case5:Student_SortByAverage();Student_Display();break;case6:exit(0);break;}IO_WriteInfo();}}
if(strcmp(students[i].ID,id)==0)
returni;
return-1;
/*通过姓名返回数组下标*/
intStudent_SearchByName(charname[])
for(i=0;i{if(strcmp(students[i].Name,name)==0){returni;}}return-1;}/*显示单条学生记录*/voidStudent_DisplaySingle(intindex){printf("%10s%10s%8s%8s%8s%10s\n","学号","姓名","成绩","成绩","成绩","平均成绩");printf("-------------------------------------------------------------\n");printf("%10s%10s%8.2f%8.2f%8.2f%10.2f\n",students[index].ID,students[index].Name,students[index].Mark1,students[index].Mark2,students[index].Mark3,students[index].Average);}/*插入学生信息*/voidStudent_Insert(){while(1){printf("请输入学号:");scanf("%s",&students[num].ID);getchar();printf("请输入姓名:");scanf("%s",&students[num].Name);getchar();printf("请输入成绩:");scanf("%f",&students[num].Mark1);getchar();printf("请输入成绩:");scanf("%f",&students[num].Mark2);getchar();printf("请输入成绩:");scanf("%f",&students[num].Mark3);getchar();students[num].Average=Avg(students[num]);num++;printf("是否继续?(y/n)");if(getchar()=='n'){break;}}}/*修改学生信息*/voidStudent_Modify(){//floatmark1,mark2,mark3;while(1){charid[20];intindex;printf("请输入要修改的学生的学号:");scanf("%s",&id);getchar();index=Student_SearchByIndex(id);if(index==-1){printf("学生不存在!\n");}else{printf("你要修改的学生信息为:\n");Student_DisplaySingle(index);printf("--请输入新值--\n"); printf("请输入学号:");scanf("%s",&students[index].ID);getchar(); printf("请输入姓名:");scanf("%s",&students[index].Name);getchar(); printf("请输入成绩:");scanf("%f",&students[index].Mark1);getchar(); printf("请输入成绩:");scanf("%f",&students[index].Mark2);getchar(); printf("请输入成绩:");scanf("%f",&students[index].Mark3);getchar(); students[index].Average=Avg(students[index]);}printf("是否继续?(y/n)");if(getchar()=='n'){break;}}}/*删除学生信息*/voidStudent_Delete(){inti;while(1){charid[20];intindex;printf("请输入要删除的学生的学号:");scanf("%s",&id);getchar();index=Student_SearchByIndex(id);if(index==-1){printf("学生不存在!\n");}else{printf("你要删除的学生信息为:\n");Student_DisplaySingle(index);printf("是否真的要删除?(y/n)");if(getchar()=='y'){for(i=index;i{students[i]=students[i+1];//把后边的对象都向前移动}num--;}getchar();}printf("是否继续?(y/n)");if(getchar()=='n'){break;}}}/*按姓名查询*/voidStudent_Select(){while(1){charname[20];intindex;printf("请输入要查询的学生的姓名:");scanf("%s",&name);getchar();index=Student_SearchByName(name);if(index==-1){printf("学生不存在!\n");}else{printf("你要查询的学生信息为:\n");Student_DisplaySingle(index);}printf("是否继续?(y/n)");if(getchar()=='n'){break;}}}/*按平均值排序*/voidStudent_SortByAverage(){inti,j;structStudenttmp;for(i=0;i{for(j=1;j{if(students[j-1].Average{tmp=students[j-1];students[j-1]=students[j];students[j]=tmp;}}}}/*显示学生信息*/voidStudent_Display(){inti;printf("%10s%10s%8s%8s%8s%10s\n","学号","姓名","成绩","成绩","成绩","平均成绩");printf("-------------------------------------------------------------\n");for(i=0;i{printf("%10s%10s%8.2f%8.2f%8.2f%10.2f\n",students[i].ID,students[i].Name,students[i].Mark1,students[i].Mark2,students[i].Mark3,students[i].Average);}}/*将学生信息从文件读出*/voidIO_ReadInfo(){FILE*fp;inti;if((fp=fopen("Database.txt","rb"))==NULL){printf("不能打开文件!\n");return;}if(fread(&num,sizeof(int),1,fp)!=1){num=-1;}else{for(i=0;i{fread(&students[i],sizeof(structStudent),1,fp);}}fclose(fp);}/*将学生信息写入文件*/voidIO_WriteInfo(){FILE*fp;inti;if((fp=fopen("Database.txt","wb"))==NULL){printf("不能打开文件!\n");return;}if(fwrite(&num,sizeof(int),1,fp)!=1){printf("写入文件错误!\n");}for(i=0;i{if(fwrite(&students[i],sizeof(structStudent),1,fp)!=1){printf("写入文件错误!\n");}}fclose(fp);}/*主程序*/voidmain(){intchoice;IO_ReadInfo();while(1){/*主菜单*/printf("\n------学生成绩管理系统------\n");printf("1.增加学生记录\n");printf("2.修改学生记录\n");printf("3.删除学生记录\n");printf("4.按姓名查询学生记录\n");printf("5.按平均成绩排序\n");printf("6.退出\n");printf("请选择(1-6):");scanf("%d",&choice);getchar();switch(choice){case1:Student_Insert();break;case2:Student_Modify();break;case3:Student_Delete();break;case4:Student_Select();break;case5:Student_SortByAverage();Student_Display();break;case6:exit(0);break;}IO_WriteInfo();}}
if(strcmp(students[i].Name,name)==0)
/*显示单条学生记录*/
voidStudent_DisplaySingle(intindex)
printf("%10s%10s%8s%8s%8s%10s\n","学号","姓名","成绩","成绩","成绩","平均成绩");
printf("-------------------------------------------------------------\n");
printf("%10s%10s%8.2f%8.2f%8.2f%10.2f\n",students[index].ID,students[index].Name,
students[index].Mark1,students[index].Mark2,students[index].Mark3,students[index].Average);
/*插入学生信息*/
voidStudent_Insert()
while
(1)
printf("请输入学号:
");
scanf("%s",&students[num].ID);
getchar();
printf("请输入姓名:
scanf("%s",&students[num].Name);
printf("请输入成绩:
scanf("%f",&students[num].Mark1);
scanf("%f",&students[num].Mark2);
scanf("%f",&students[num].Mark3);
students[num].Average=Avg(students[num]);
num++;
printf("是否继续?
(y/n)");
if(getchar()=='n')
break;
/*修改学生信息*/
voidStudent_Modify()
//floatmark1,mark2,mark3;
charid[20];
intindex;
printf("请输入要修改的学生的学号:
scanf("%s",&id);
index=Student_SearchByIndex(id);
if(index==-1)
printf("学生不存在!
\n");
else
printf("你要修改的学生信息为:
Student_DisplaySingle(index);
printf("--请输入新值--\n");
scanf("%s",&students[index].ID);
scanf("%s",&students[index].Name);
scanf("%f",&students[index].Mark1);
scanf("%f",&students[index].Mark2);
scanf("%f",&students[index].Mark3);
students[index].Average=Avg(students[index]);
/*删除学生信息*/
voidStudent_Delete()
printf("请输入要删除的学生的学号:
printf("你要删除的学生信息为:
printf("是否真的要删除?
if(getchar()=='y')
for(i=index;i{students[i]=students[i+1];//把后边的对象都向前移动}num--;}getchar();}printf("是否继续?(y/n)");if(getchar()=='n'){break;}}}/*按姓名查询*/voidStudent_Select(){while(1){charname[20];intindex;printf("请输入要查询的学生的姓名:");scanf("%s",&name);getchar();index=Student_SearchByName(name);if(index==-1){printf("学生不存在!\n");}else{printf("你要查询的学生信息为:\n");Student_DisplaySingle(index);}printf("是否继续?(y/n)");if(getchar()=='n'){break;}}}/*按平均值排序*/voidStudent_SortByAverage(){inti,j;structStudenttmp;for(i=0;i{for(j=1;j{if(students[j-1].Average{tmp=students[j-1];students[j-1]=students[j];students[j]=tmp;}}}}/*显示学生信息*/voidStudent_Display(){inti;printf("%10s%10s%8s%8s%8s%10s\n","学号","姓名","成绩","成绩","成绩","平均成绩");printf("-------------------------------------------------------------\n");for(i=0;i{printf("%10s%10s%8.2f%8.2f%8.2f%10.2f\n",students[i].ID,students[i].Name,students[i].Mark1,students[i].Mark2,students[i].Mark3,students[i].Average);}}/*将学生信息从文件读出*/voidIO_ReadInfo(){FILE*fp;inti;if((fp=fopen("Database.txt","rb"))==NULL){printf("不能打开文件!\n");return;}if(fread(&num,sizeof(int),1,fp)!=1){num=-1;}else{for(i=0;i{fread(&students[i],sizeof(structStudent),1,fp);}}fclose(fp);}/*将学生信息写入文件*/voidIO_WriteInfo(){FILE*fp;inti;if((fp=fopen("Database.txt","wb"))==NULL){printf("不能打开文件!\n");return;}if(fwrite(&num,sizeof(int),1,fp)!=1){printf("写入文件错误!\n");}for(i=0;i{if(fwrite(&students[i],sizeof(structStudent),1,fp)!=1){printf("写入文件错误!\n");}}fclose(fp);}/*主程序*/voidmain(){intchoice;IO_ReadInfo();while(1){/*主菜单*/printf("\n------学生成绩管理系统------\n");printf("1.增加学生记录\n");printf("2.修改学生记录\n");printf("3.删除学生记录\n");printf("4.按姓名查询学生记录\n");printf("5.按平均成绩排序\n");printf("6.退出\n");printf("请选择(1-6):");scanf("%d",&choice);getchar();switch(choice){case1:Student_Insert();break;case2:Student_Modify();break;case3:Student_Delete();break;case4:Student_Select();break;case5:Student_SortByAverage();Student_Display();break;case6:exit(0);break;}IO_WriteInfo();}}
students[i]=students[i+1];//把后边的对象都向前移动
num--;
/*按姓名查询*/
voidStudent_Select()
charname[20];
printf("请输入要查询的学生的姓名:
scanf("%s",&name);
index=Student_SearchByName(name);
printf("你要查询的学生信息为:
/*按平均值排序*/
voidStudent_SortByAverage()
inti,j;
structStudenttmp;
for(i=0;i{for(j=1;j{if(students[j-1].Average{tmp=students[j-1];students[j-1]=students[j];students[j]=tmp;}}}}/*显示学生信息*/voidStudent_Display(){inti;printf("%10s%10s%8s%8s%8s%10s\n","学号","姓名","成绩","成绩","成绩","平均成绩");printf("-------------------------------------------------------------\n");for(i=0;i{printf("%10s%10s%8.2f%8.2f%8.2f%10.2f\n",students[i].ID,students[i].Name,students[i].Mark1,students[i].Mark2,students[i].Mark3,students[i].Average);}}/*将学生信息从文件读出*/voidIO_ReadInfo(){FILE*fp;inti;if((fp=fopen("Database.txt","rb"))==NULL){printf("不能打开文件!\n");return;}if(fread(&num,sizeof(int),1,fp)!=1){num=-1;}else{for(i=0;i{fread(&students[i],sizeof(structStudent),1,fp);}}fclose(fp);}/*将学生信息写入文件*/voidIO_WriteInfo(){FILE*fp;inti;if((fp=fopen("Database.txt","wb"))==NULL){printf("不能打开文件!\n");return;}if(fwrite(&num,sizeof(int),1,fp)!=1){printf("写入文件错误!\n");}for(i=0;i{if(fwrite(&students[i],sizeof(structStudent),1,fp)!=1){printf("写入文件错误!\n");}}fclose(fp);}/*主程序*/voidmain(){intchoice;IO_ReadInfo();while(1){/*主菜单*/printf("\n------学生成绩管理系统------\n");printf("1.增加学生记录\n");printf("2.修改学生记录\n");printf("3.删除学生记录\n");printf("4.按姓名查询学生记录\n");printf("5.按平均成绩排序\n");printf("6.退出\n");printf("请选择(1-6):");scanf("%d",&choice);getchar();switch(choice){case1:Student_Insert();break;case2:Student_Modify();break;case3:Student_Delete();break;case4:Student_Select();break;case5:Student_SortByAverage();Student_Display();break;case6:exit(0);break;}IO_WriteInfo();}}
for(j=1;j{if(students[j-1].Average{tmp=students[j-1];students[j-1]=students[j];students[j]=tmp;}}}}/*显示学生信息*/voidStudent_Display(){inti;printf("%10s%10s%8s%8s%8s%10s\n","学号","姓名","成绩","成绩","成绩","平均成绩");printf("-------------------------------------------------------------\n");for(i=0;i{printf("%10s%10s%8.2f%8.2f%8.2f%10.2f\n",students[i].ID,students[i].Name,students[i].Mark1,students[i].Mark2,students[i].Mark3,students[i].Average);}}/*将学生信息从文件读出*/voidIO_ReadInfo(){FILE*fp;inti;if((fp=fopen("Database.txt","rb"))==NULL){printf("不能打开文件!\n");return;}if(fread(&num,sizeof(int),1,fp)!=1){num=-1;}else{for(i=0;i{fread(&students[i],sizeof(structStudent),1,fp);}}fclose(fp);}/*将学生信息写入文件*/voidIO_WriteInfo(){FILE*fp;inti;if((fp=fopen("Database.txt","wb"))==NULL){printf("不能打开文件!\n");return;}if(fwrite(&num,sizeof(int),1,fp)!=1){printf("写入文件错误!\n");}for(i=0;i{if(fwrite(&students[i],sizeof(structStudent),1,fp)!=1){printf("写入文件错误!\n");}}fclose(fp);}/*主程序*/voidmain(){intchoice;IO_ReadInfo();while(1){/*主菜单*/printf("\n------学生成绩管理系统------\n");printf("1.增加学生记录\n");printf("2.修改学生记录\n");printf("3.删除学生记录\n");printf("4.按姓名查询学生记录\n");printf("5.按平均成绩排序\n");printf("6.退出\n");printf("请选择(1-6):");scanf("%d",&choice);getchar();switch(choice){case1:Student_Insert();break;case2:Student_Modify();break;case3:Student_Delete();break;case4:Student_Select();break;case5:Student_SortByAverage();Student_Display();break;case6:exit(0);break;}IO_WriteInfo();}}
if(students[j-1].Average{tmp=students[j-1];students[j-1]=students[j];students[j]=tmp;}}}}/*显示学生信息*/voidStudent_Display(){inti;printf("%10s%10s%8s%8s%8s%10s\n","学号","姓名","成绩","成绩","成绩","平均成绩");printf("-------------------------------------------------------------\n");for(i=0;i{printf("%10s%10s%8.2f%8.2f%8.2f%10.2f\n",students[i].ID,students[i].Name,students[i].Mark1,students[i].Mark2,students[i].Mark3,students[i].Average);}}/*将学生信息从文件读出*/voidIO_ReadInfo(){FILE*fp;inti;if((fp=fopen("Database.txt","rb"))==NULL){printf("不能打开文件!\n");return;}if(fread(&num,sizeof(int),1,fp)!=1){num=-1;}else{for(i=0;i{fread(&students[i],sizeof(structStudent),1,fp);}}fclose(fp);}/*将学生信息写入文件*/voidIO_WriteInfo(){FILE*fp;inti;if((fp=fopen("Database.txt","wb"))==NULL){printf("不能打开文件!\n");return;}if(fwrite(&num,sizeof(int),1,fp)!=1){printf("写入文件错误!\n");}for(i=0;i{if(fwrite(&students[i],sizeof(structStudent),1,fp)!=1){printf("写入文件错误!\n");}}fclose(fp);}/*主程序*/voidmain(){intchoice;IO_ReadInfo();while(1){/*主菜单*/printf("\n------学生成绩管理系统------\n");printf("1.增加学生记录\n");printf("2.修改学生记录\n");printf("3.删除学生记录\n");printf("4.按姓名查询学生记录\n");printf("5.按平均成绩排序\n");printf("6.退出\n");printf("请选择(1-6):");scanf("%d",&choice);getchar();switch(choice){case1:Student_Insert();break;case2:Student_Modify();break;case3:Student_Delete();break;case4:Student_Select();break;case5:Student_SortByAverage();Student_Display();break;case6:exit(0);break;}IO_WriteInfo();}}
tmp=students[j-1];
students[j-1]=students[j];
students[j]=tmp;
/*显示学生信息*/
voidStudent_Display()
for(i=0;i{printf("%10s%10s%8.2f%8.2f%8.2f%10.2f\n",students[i].ID,students[i].Name,students[i].Mark1,students[i].Mark2,students[i].Mark3,students[i].Average);}}/*将学生信息从文件读出*/voidIO_ReadInfo(){FILE*fp;inti;if((fp=fopen("Database.txt","rb"))==NULL){printf("不能打开文件!\n");return;}if(fread(&num,sizeof(int),1,fp)!=1){num=-1;}else{for(i=0;i{fread(&students[i],sizeof(structStudent),1,fp);}}fclose(fp);}/*将学生信息写入文件*/voidIO_WriteInfo(){FILE*fp;inti;if((fp=fopen("Database.txt","wb"))==NULL){printf("不能打开文件!\n");return;}if(fwrite(&num,sizeof(int),1,fp)!=1){printf("写入文件错误!\n");}for(i=0;i{if(fwrite(&students[i],sizeof(structStudent),1,fp)!=1){printf("写入文件错误!\n");}}fclose(fp);}/*主程序*/voidmain(){intchoice;IO_ReadInfo();while(1){/*主菜单*/printf("\n------学生成绩管理系统------\n");printf("1.增加学生记录\n");printf("2.修改学生记录\n");printf("3.删除学生记录\n");printf("4.按姓名查询学生记录\n");printf("5.按平均成绩排序\n");printf("6.退出\n");printf("请选择(1-6):");scanf("%d",&choice);getchar();switch(choice){case1:Student_Insert();break;case2:Student_Modify();break;case3:Student_Delete();break;case4:Student_Select();break;case5:Student_SortByAverage();Student_Display();break;case6:exit(0);break;}IO_WriteInfo();}}
printf("%10s%10s%8.2f%8.2f%8.2f%10.2f\n",students[i].ID,students[i].Name,
students[i].Mark1,students[i].Mark2,students[i].Mark3,students[i].Average);
/*将学生信息从文件读出*/
voidIO_ReadInfo()
FILE*fp;
if((fp=fopen("Database.txt","rb"))==NULL)
printf("不能打开文件!
return;
if(fread(&num,sizeof(int),1,fp)!
=1)
num=-1;
for(i=0;i{fread(&students[i],sizeof(structStudent),1,fp);}}fclose(fp);}/*将学生信息写入文件*/voidIO_WriteInfo(){FILE*fp;inti;if((fp=fopen("Database.txt","wb"))==NULL){printf("不能打开文件!\n");return;}if(fwrite(&num,sizeof(int),1,fp)!=1){printf("写入文件错误!\n");}for(i=0;i{if(fwrite(&students[i],sizeof(structStudent),1,fp)!=1){printf("写入文件错误!\n");}}fclose(fp);}/*主程序*/voidmain(){intchoice;IO_ReadInfo();while(1){/*主菜单*/printf("\n------学生成绩管理系统------\n");printf("1.增加学生记录\n");printf("2.修改学生记录\n");printf("3.删除学生记录\n");printf("4.按姓名查询学生记录\n");printf("5.按平均成绩排序\n");printf("6.退出\n");printf("请选择(1-6):");scanf("%d",&choice);getchar();switch(choice){case1:Student_Insert();break;case2:Student_Modify();break;case3:Student_Delete();break;case4:Student_Select();break;case5:Student_SortByAverage();Student_Display();break;case6:exit(0);break;}IO_WriteInfo();}}
fread(&students[i],sizeof(structStudent),1,fp);
fclose(fp);
/*将学生信息写入文件*/
voidIO_WriteInfo()
if((fp=fopen("Database.txt","wb"))==NULL)
if(fwrite(&num,sizeof(int),1,fp)!
printf("写入文件错误!
for(i=0;i{if(fwrite(&students[i],sizeof(structStudent),1,fp)!=1){printf("写入文件错误!\n");}}fclose(fp);}/*主程序*/voidmain(){intchoice;IO_ReadInfo();while(1){/*主菜单*/printf("\n------学生成绩管理系统------\n");printf("1.增加学生记录\n");printf("2.修改学生记录\n");printf("3.删除学生记录\n");printf("4.按姓名查询学生记录\n");printf("5.按平均成绩排序\n");printf("6.退出\n");printf("请选择(1-6):");scanf("%d",&choice);getchar();switch(choice){case1:Student_Insert();break;case2:Student_Modify();break;case3:Student_Delete();break;case4:Student_Select();break;case5:Student_SortByAverage();Student_Display();break;case6:exit(0);break;}IO_WriteInfo();}}
if(fwrite(&students[i],sizeof(structStudent),1,fp)!
/*主程序*/
voidmain()
intchoice;
IO_ReadInfo();
/*主菜单*/
printf("\n------学生成绩管理系统------\n");
printf("1.增加学生记录\n");
printf("2.修改学生记录\n");
printf("3.删除学生记录\n");
printf("4.按姓名查询学生记录\n");
printf("5.按平均成绩排序\n");
printf("6.退出\n");
printf("请选择(1-6):
scanf("%d",&choice);
switch(choice)
case1:
Student_Insert();
case2:
Student_Modify();
case3:
Student_Delete();
case4:
Student_Select();
case5:
Student_SortByAverage();
Student_Display();
case6:
exit(0);
IO_WriteInfo();
copyright@ 2008-2023 冰点文库 网站版权所有
经营许可证编号:鄂ICP备19020893号-2