1、4.1(3) #iiicludeint a、b;scanfC%2d%*2s%2d”,&a,&b); piiDtfp%d.%dir;a,b);4.2#iiicludelong a,b;float x、y;scanfC%d,%dn 役& scanf(H%f,%fur&x.&y); piintf(Ma=%d.b=%d,ii,a.b); pnntfC,x=%fb=%farx,v);5.1 #iiiclude=0)a=a; pnntfa=%fn=);elsea=-a;5 2 #iiicludeint a;pnntf(HIiiputa:scanff%cT;if(a%2=0)prmtf(a 是偶数”);pi
2、uitf(a 是奇数”);5.3#iiicludec&a+cb&b+ca) s=(a+b+c)/2;area=(float)sqrt(s * (s-a) * (s-b)* (s-c);priiitf(naiea=%f.n,area);pnntf(”不是三角形”);5.4#iiiclude#iiicludemam()float a、b,c,x,y;pmitfClnputabcJ);if(a=0) pnntf(”该方程不是一元二次方程”);if(b*b-4*a*c0) x=(-b+sqrt(b *b-4*a *c)/(2*a); v=(-b-sqrt(b*b-4*a*c)/(2*a); pnntf
3、x=%f,y=%fm 役x,y);else if(b*b-4*a*c=0)x=-b/(2*a);v=-b/(2*a); pnntf(”该方程无实根n”);5.5#iiicludeint yeai;flag;printf(MIiiput a vear:scanfd&yeai);if(y 亡 ai%4=0&yeai-%400! =01 |year%400=0) flag=l;flag=0;if(flag=l)piiiitf(n%d is a leap year !n”,yeaQ;piiiitf(,%d is not a leap year lyear);5.6#iiicludescanfld&fl
4、ag=veai-%400=0|year%4=0&y 亡 ai%100!=0H:0;if(flag=l & flag! =0)priiitf(n%d is a leap year !n,vear);is not a leap year lyear);5.7#iiiclude=,a,&ch=,A,&cli=Zf)ch=ch+32;pnntff%L,ch);5 8 #iiiclude pnntf(MIiiputch: scanf(”ct&=48&=57)pruitf(ch是数字字符n);=65&=90)pimtfCch是大写字母n=97&=122) pnntf(”ch是小写字母nelse if(ch
5、=32)printf(” ch 是空格 n”); pimtfCch是其他字符n”);5.9 #iiicludeint score,grade; printf(MIiiput score:n); scanf(H%d,&scoie); grade=score/10; if(score 100)priiitf(nInput enornH);if(score=90&score=80&90)(nHormuud use。VoDSCO-6DSCO 二 Tusco?mund二 QSCO 小 QseoLL00QseoOTDSCO (quourtTCQA)q0ws) (MquTOU- mkmd(OHVqluou二
6、 一 e t cqnrosJT YqnKHU$HCQA$=p%,p%kueos (qluomcQA mduLuudqluourl-TUQA.s)OUTUlu cq.oTplsvQpnpn%OT.Z 宀?OOS.Mg:pOHCQ】oosm Qso 益oostuCI:)七 und) (ozQ】oos$09Ho】oosmUSR i?TOOSxuo:p 贾.)七 und) (08VQ】oos$OLH9】oosmUSR i7oosruq:p*k-undcase 2:if(year%4=0&yeai-1=01 |yeai-%400=0) 29 天n”);28 天n”);break;default:prmt
7、f(nIiiput enoriiH);6.1(1) #mcludeint ijjc;char space-:fbr(i=l;i=4;i-H-)for(j=lj=iJ+)pimtf(%c,space);for(k=l ;k=6;k+)pnntf(”n6.1(2) #iiicludeint k=4,n;fbr(n=0;nk;n-H-)if(n%2=0) continue;k-;6.1(3) #mcludefbr(n=O ;n+)if(n%2=0) break; k-; printf(,k=%d.n=%d,n,k.n);6.2(1) #iiicludeint i.sum=O;fbr(i= 1 ;=
8、101 ;i+)sum=sum+i; printf(MsiHii=%dn,sum);6.2(2) #mcludelong i;long term,sum=0; fbr(i= 1 ;i=i+2) term=i*(i+l)* (i+2); sum=sum4-term;printf(Msum=%ldii,sum);6.2(4) #includeint n=l;float term= 1.0,sign= 1 .sum=0; while(term= 1 e-4) term=1.0/sign; sum=sum-rterm; sign=sign+n:n+;printf(Msum=%fn,sum);6.2(5
9、) #iiiclude# iiiclude= 1 e-5); printf(Msm(x)=%f,count=%d,di,sum,count);6.3 #iiicludeint x=l,fiiid=0;if(x%2= 1&X %3=2&x%5=4&x%6=5&x%7=0) prmtf(Hx=%dn,x);find=l;x+;/* int x.find=0;for (x= 1;! find ;x+)*/6.4 #iiicludeint i; long p=l ,m=l;pnntf(MIiiput n: scanfC%dJ&ii);=n;p=l*l;piintfCp=%d .m=%dn ;6 5 #
10、iiicludefloat c、f;fbr(c=-40;c=110;c=c+10)9/5 陀+32;printf(”6.6#iiiclude# mclude0); pnntffx=%diU,x);6.7#iiicludeint n=0;float a=100.0、c; pnntf(MIiiputc: scanf(H%f& doa=a*(l+c); wliile(a=200);prmtf(nn=%dirn);6.8#iiiclude= 1 e-5) term=pow(-l,count) *( 1.0/(n+2); count+;sum=4*sum;printf( nsum=%fcount=%dn
11、H,sum,count);6.9#iiiclude= 1 e-5)term=tenn*(l .0/n);sum=sum4-term;I1+;printf(Msum=%fcount=%dn,sum.count);6.10# includeniam()int x;fbr(x= 100;x=999;if(x=pow(x/100、3)+pow(x/ 10%l 0、3)+pow(x% 103) pnntffx=%diV,x); 6.11#iiicludeint i=0.n;long sum=0jerm=l;pnntf(MIiiputn:scanff%cr,&i+;term=tenn*i;sum=sum-
12、rterm;wliile(sum6.12#includesum=sum+m;prmtf(nsum=%d,count=%dii,sum,count);6.13# includemt i,naiKcount=0.sum=0;for(i=l;0|m piiiitf(nsum=%clxount=%dii,sunLcount);6.14# iiicludeint x,y,z;fbr(x=O;= 17 ;fbr(y=O;y=25;y+) 3*x+2*y+z=50; z=30-x-y;if( 3 *x+2*y+z=50&x+y+z=30) pdntfpx=%d,y=%d,z=%dn-xyz);6.15# i
13、ncludeint x,y;fbr(x=0;=98;y=98-x;2*x+4*y=386;if(x+y=98&2*x+4*y=386)pnntffx=%d,y-%diT,x,y);6.16# iiiclude=20;for(y=0;=33;3 *y+5 *x+z/3.0= 100;z=100-x-v;if (5*x+3*y+z/30=100&z+x+y=100) pdntfCx=%cLy=%d、z=%dn 役x,y,z);6.17# iiicludepHitf(”x=%d,y=%d,z=%diT,xyz);7.1#iiicludemt Squaie(int i)return i*i;mt ma
14、m()mt i=O;i=Squaie(i);fbr( ;3;static iiit i=l;i-r=Squaie(i);return 0;7.2#iiicludemt houraiiiiiute.second;void updateQsecond+;if(second=60)second=0;niuiute+;if(nunute=60)nuiiute=0;hour+;if(houi-=24)houi=0;void display()piintf(M%d.%d,%dnn,hoinniinute,second);void delay()mt t;fbr(t=0;t100000000;t+);int
15、 i;void updaye(),display(),delayO; foi(i=0;1000000;updateQ;displayO; delav();7.3#iiicludeint GetMax(int a,int b);int xymax; piintfplnputxy J; scanfC%d,%dx,& max=GetMax(x,y); printf(,max=%dn,niax); return 0;mt GetMax(iiit n)return m;return n;7.4#iiicludemt LCM(iiit njnt m);pnntf(MIiiputa,b: scanfC%d,
16、%d”,&printf(”dir,LCM(a,b);mt LCM(iiit njnt m)liltmt fiiid=O; fdr(x=l;fuid;if(x%n=O&x%m=O) find=l;return x-1;7 5 #includelong Fact(mt n);mt m,a; pinitffInpiHmJ); scanfC%cT、& fbr(a=l ;a=m;a+)pimtf(M%d! =%ldn,a,Fact(a); return 0;long Fact(mt n) longresult=l; fdr(i=2;i+) result*=i;return result;7.6 #iiicludeint m;long ret; pmitfflnpiiun); scmfC%dt& ret=Fact(m); pnntf(Mret=%dii,ret);long iesult=l,sum=0;fbr(i=2;result*=i; sum=sum4-iesult;return sum;7.7(1) #mcludemt Gcd(iiit ajnt b);int 11141;printf(MIiiputni.n: ”);%d,%d 役&叫&
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