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阶乘 #include stdio.hvoid main(){float fac(int n);int n;float y;printf(input an integer numaber\n);scanf(%d,n);y=fac(n);printf(%d!=%1.0f\n,n,y); }float fac(int n){float f;if(n0){printf(n0,dataerror!);}elseif(n==0||n==1)f=1;elsef=fac(n-1)*n;return(f);}#include stdio.hvoid main(){int i,t;t=1;i=2;while(i=n){t=t*i;i=i+1;}printf(%d/n,t);} 求5的阶乘#include stdio.hvoid main(){int fac(int n);int i;for(i=1;i=5;i++)printf(%d!=%d\n,i,fac(i));}int fac(int n){static int f=1;f=f*n;return(f);} 杨惠三角 define n 11main(){int i,j,a[n][n];for(i=1;in;i++){a[i][i]=1;a[i][1]=1;}for(i=3;in;i++)for(j=2;ji-1;j++)a[i][j]=a[i-1][j-1]+a[i-1][j];for(i=1;in;i++){for(j=1;j=i;j++)printf(%6d,a[i][j]);printf(/n);}printf(/n);} 最大公约数和最小公倍数#includestdio.hvoid main(){int hcf(int,int);int lcd(int,int,int);int u,v,h,l;scanf(%d,%d,u,v);h=hcf(u,v);printf(h.c.f=%d\n,h);l=lcd(u,v,h);printf(lcd=%d\n,l);}int hcf(int u,int v){int t,r;if(vu){t=u;u=v;v=t;}while((r=u%v)!=0){u=v;v=r;}return(v);}int lcd(int u,int v,int h){return(u*v/h);}用选择法对10个整数排序（由小到大）#include stdio.hvoid main (){int i,j,main,temp,a[11];printf(enter data :\n);for(i=1;i=10;i++){printf(a[%d]=,i);scanf(%d,a[i]);}printf(\n);printf(the original numbers :\n);for(i=1;i=10;i++)printf(%5d,a[i]);printf(\n);for(i=1;i=9;i++){int min=i;for(j=i+1;j=10;j++)if(a[min]a[j]) min=j;temp=a[i];a[i]=a[min];a[min]=temp;}printf(\nthe sorted numbers :\n);for(i=1;i=10;i++)printf(%5d,a[i]);printf(\n);用起泡法对10个字符排序（由小到大）#include stdio.hvoid main(){int a[10];int i,j,t;printf(请输入10个数：\n);for(i=0;i10;i++)scanf(%d,a[i]);printf(\n);for(j=0;j9;j++)for(i=0;i9-j;i++)if(a[i]a[i+1]){t=a[i];a[i]=a[i+1];a[i+1]=t;}printf(输出结果：\n);for(i=0;i10;i++)printf(%d,a[i]);printf(\n);} 二维数组:将一个二维数组a的行和列的元素互换，存到另一个二维数组b中。 #include stdio.hvoid main(){int a[2][3]={{1,2,3,},{4,5,6,}};int b[3][2],i,j;printf(arraya:/n);for(i=0;i=1;i++){for(j=0;j=2;j++){printf(%5d,a[i][j]);b[j][i]