用C语言解决的一些问题1修正.doc

圆面积周长#define PI 3.1415926#include void main()int r;float s,l;scanf(%d,&r);s=PI*r*r;l=2*PI*r;printf(s=%fnl=%fn,s,l);强制转化#include void main()int a,b;float s;scanf(%d,%d,&a,&b);s=(float)(a*b/2);printf(s=%fn,s);三者求最大值#include void main()int max(int x,int y);int a,b,c,d,e;scanf(%d,%d,%d,&a,&b,&c);d=max(a,b);e=max(c,d);printf(max=%dn,e);int max(int x,int y)int z;if (xy) z=x;else z=y;return(z);杨辉三角#include void main()int i,j,m,n,c;scanf(i=%d,&i); /*输入行数*/for (m=0;m=i;m+)c=1;for (j=1;j=40-3*m;j+)printf( );printf(%d,c); for (n=1;n=m;n+)c=c*(m-n+1)/n;printf(%6d,c);printf(n);鸡兔数量问题#include void main()int a,b,c,d;scanf(%d,%d,&a,&b);c=(b-2*a)/2;d=a-c;printf(hen=%dnrab=%dn,d,c);倒序输出三位整数#include void main()int a,b,c,d;scanf(%d,&a);b=a/100;c=(a-b*100)/10;d=a%10;printf(%d%d%dn,d,c,b);倒序输出任意数#includevoid main() int a;scanf(%d,&a); doprintf(%d,a%10);a/=10;while (a!=0);printf(n);温度转化#include void main()int f;float c; scanf(%d,&f);c=5*(f-32)/(float)9;printf(c=%.2fn,c);scanf是读出数据#include void main() int score; char degree; printf(input score from 0-100n); scanf(%d,&score); printf(input degree from A to En); getchar(); scanf(%c,°ree); /scanf是从内存缓冲区中读出数据 printf(score=%d; degree=%cn,score,degree);输出日期的前一天和后一天#include void main()int y,m,d,leap;scanf(%d,%d,%d,&y,&m,&d);if (y%4=0 & y%100 !=0 )| (y%400=0) leap=1;else leap=0;switch(d)case 1:printf(%d,%d,%dn,y,m,d+1);-m;if (m=1|m=3|m=5|m=7|m=8|m=10)d=31;else if (m=0)y-;m=12;d=31; else if (m=4|m=6|m=9|m=11)d=30; else if (leap=1)d=29; else d=28;printf(%d,%d,%dn,y,m,d);break;case 2: case 3:case 4:case 5:case 6:case 7:case 8:case 9:case 10:case 11:case 12:case 13:case 14:case 15:case 16:case 17:case 18:case 19: case 20:case 21:case 22:case 23:case 24:case 25:case 26:case 27:printf(%d,%d,%dn,y,m,d-1);printf(%d,%d,%dn,y,m,d+1);break;case 28:printf(%d,%d,%dn,y,m,d-1); if (m=2) & (leap=0)d=1;m+;printf(%d,%d,%dn,y,m,d); else if (m=2)d=29;printf(%d,%d,%dn,y,m,d);break;case 29:printf(%d,%d,%dn,y,m,d-1);if (m=2)d=1;m+; else d+;printf(%d,%d,%dn,y,m,d);break;case 30:printf(%d,%d,%dn,y,m,d-1); if (m=4|m=6|m=9|m=11)d=1;m+;printf(%d,%d,%dn,y+1,m,d);else d+;break;case 31:printf(%d,%d,%dn,y,m,d-1);d=1; if (m=12)y+;m=m%12+1; printf(%d,%d,%dn,y,m,d);break;纯if语句输出日期前后一天#include void main()int y,m,d,l=0;scanf(%d,%d,%d,&y,&m,&d);if (y%4=0 & y%100!=0)|(y%400=0)l=1;if(d1&d1&m12)printf(%d,%d,%dn,y,m,d-1);d+;printf(%d,%d,%dn,y,m+1,d); else if (d=1)printf(%d,%d,%dn,y,m,d+1); if(m=1)m=12;d=31;printf(%d,%d,%dn,y-1,m,d); else if (m=3)if(l=1)d=29;m-;printf(%d,%d,%dn,y,m,d); else d=28;m-;printf(%d,%d,%dn,y,m,d); else if(m=2|m=4|m=6|m=8|m=9|m=11) m-;d=31;printf(%d,%d,%dn,y,m,d); else m-;printf(%d,%d,%dn,y,m,d=30); else if(d=29) printf(%d,%d,%dn,y,m,d-1);if(m=2&l=1) m+;d=1;printf(%d,%d,%dn,y,m,d); else printf(%d,%d,%dn,y,m,d+1); else if(d=28) printf(%d,%d,%dn,y,m,d-1);printf(%d,%d,%dn,y,m,d+1); else printf(%d,%d,%dn,y,m,d-1);if (m=4|m=6|m=9|m=11) printf(%d,%d,%dn,y,m+1,d%30+1); else printf(%d,%d,%dn,y,m,d+1);判断等级#include void main()float grade;int a;scanf(%f,&grade);if (grade100)a=0;else if (grade=90)a=1; else if (grade=80)a=2; else if (grade =60)a=3; else a=4; switch(a)case 1:printf(An);break; case 2:printf(Bn);break;case 3:printf(Cn);break;case 4:printf(Dn);break;case 0:printf(成绩不合法n);break;阶乘三种实现：for,while,do.while.#includevoid main()long s=1,j,n;scanf(%d,&n);for (j=1;j=n;j+)s=s*j;printf(%dn,s);#includevoid main()long s=1,j=1,n;scanf(%d,&n); while (j=n)s=s*j;j+;printf(%dn,s);#includevoid main()long s=1,j=1,n;scanf(%d,&n); do s=s*j;j+; while (j=n);printf(%dn,s);直角三角米形#include void main()int i,n,j;scanf(%d,&n);for (i=1;i=n;i+) for (j=1;j=i;j+)printf( * ); printf(n);正三角米形#include void main()int i,j,m,n;scanf(%d,&n);for (i=1;i=n;i+) for (m=1;m=40-3*i;m+) printf( ); for (j=1;j=2*i-1;j+) printf( * ); printf(n);三人比赛#includevoid main()char A,B,C;for (C=X;C=Z;C+)for (B=X;B=Z;B+) for (A=X;A=Z;A+)if(A!=X&C!=X&C!=Z)printf(A-%c,B-%c,C-%cn,A,B,C);鸡的数目#includevoid main()int g,m,x;for(g=0;g=20;g+)for(m=0;m=33;m+)for(x=0;x=300;x+)if (g+m+x=100&5*g+3*m+x/3.0=100)printf(%d,%d,%dn,g,m,x);迭代法开根#include #include void main()float a,x1,x2;scanf(%f,&a);x1=a/2;x2=(x1+a/x1)/2;do x1=x2;x2=(x1+a/x1)/2; while (fabs(x2-x1)=1e-5);printf(%fn,x1);计数三位数#include void main()int i,j,k,m,n=0;for (i=1;i=4;i+)for (j=1;j=4;j+)for (k=1;k=4;k+)if (i!=j&i!=k&j!=k)m=i*100+j*10+k;printf (%dn,m);n+;printf(total=%dn,n);个数#include void main()char c;int i=0,j=0,k=0,m=0;do c=getchar();if (c=1&c=a&c=A&c=Z)j+; else if (c= )k+; else m+;while (c!=n);printf(letter=%dnnumber=%dnblank=%dnqita=%dn,j,i,k,m);狐狸追兔子#include void main()int i=10,j,k=0,a11=1;for(j=0;j+)i=i+j+1;if(i10)i=i%10;ai=ai+1;k+;if(k=1000)break;for(i=1;i=10;i+)if(ai=0)printf(%d ,i);printf(n);冒泡排序#includevoid main()int i,j,t,a10;for(i=0;i10;i+)scanf(%d,&ai);printf(n);for(i=1;i=9;i+)for(j=1;jaj)t=aj-1;aj-1=aj;aj=t;for(i=0;i=9;i+)printf(%d ,ai);printf(n);选择排序#includevoid main()int i,j,t,a10,k;for(i=0;i=9;i+)scanf(%d,&ai);for(i=0;i=8;i+)k=i;for(j=i+1;jaj)k=j;if(k!=i)t=ak;ak=ai;ai=t;for(i=0;i=9;i+)printf(%d ,ai);printf(n);矩阵转换#includevoid main()int a44=1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16;int i,j,t;for(i=0;i3;i+)for(j=i+1;j=3;j+)t=aij;aij=aji;aji=t; for(i=0;i=3;i+)for(j=0;j=3;j+)printf(%4d ,aij); printf(n);鞍点#includevoid main()int i,j,k,a33=3,5,7,2,10,1,8,6,9,m,n;for(i=0;i=2;i+)for(j=0;j=2;j+) printf(%d ,aij); printf(n);for(i=0;i=2;i+)k=0;n=0;for(j=1;j=2;j+)if(aikaij)k=j;for(m=0;m=aik)n+;if(n=3)break;if(n=3)printf(鞍点:第%d行,第%d列n,i+1,k+1);else printf(没有鞍点n);约瑟夫问题#includevoid main()int i,k=0,a18=0,n=0;for(i=1;i=17;i+) if(ai=0)k+; if(k=3) printf(%d ,i); n+; ai=1; k=0; if(i=17)i=0; if(n=17)break; printf(n);统计文章#includevoid main()char c,str380;int i,j,l=0,n=0,b=0,q=0;for(i=0;i=2;i+)gets(stri);for(i=0;i=0&c=a&c=A&c=Z)l+; else q+;printf(字母%d，数字%d，空格%d，其他%dn,l,n,b,q);平行四边形#includevoid main()char str=* * * * *;int i,j;for(i=1;i=5;i+)for(j=0;j=(i-1)*3;j+) printf( ); puts(str);printf(n);密码#includevoid main() char str100,c; int i; gets(str); for(i=0