#include"stdio.h"void main(){long int total=1;int n=1;while(n<=10){total*=n;n++ ;}printf(“the result is %ld\n”,total);}#include"stdio.h"main(){int day=0,buy=2;float sum=0.0,ave;do{sum+=0.8buy;day++;buy=2;}while(buy<=100);ave=sum/day;printf("%f\n",ave);}#include"stdio.h"void main(){int x, y, end=1;int i;printf(“please input x and y:\n”);scanf("%d%d",&x,&y);for (i=1;i<=y;i++)end=end*x%1000;printf("%d",end);}#include <stdio.h>main(){int a,b,c;for (a=1; a<=3; a++)for (b=1; b<=3; b++)for (c=1; c<=3; c++)if (a!=1&&c!=1&&c!=3&&a!=b&&a!=c&&b!=c){ printf("%c will marry to a\n", 'x' + a - 1); printf("%c will marry to b\n", 'x' + b - 1); printf("%c will marry to c\n", 'x' + c - 1);} }