#include<stdio.h> #include <stdlib.h> #include<conio.h> #include<time.h> #include<string.h> int main() { int a=0; int b=0; int c=0; int d=0; int m=0; int i,t,h,n,k,x,y; float r; scanf("%d",&n); srand((unsigned)time(NULL)); for(i=0;i<n;i++) { a=rand()%100; b=rand()%100; c=rand()%100; d=rand()%100; m=rand()%8; if(a<b) { t=a; a=b; b=t; } if(c<d) { h=c; c=d; d=h; } switch(m) { case 0: printf(" %d+%d=",a,b);break; case 1: printf(" %d-%d=",a,b);break; case 2: printf(" %d*%d=",a,b);break; case 3: printf(" %d/%d=",a,b);break; case 4: {y=b*c+a*d;x=a*c;} printf(" %d/%d+%d/%d=",a,b,c,d);break; case 5: {y=b*c-a*d;x=a*c;} printf(" %d/%d-%d/%d=",a,b,c,d);break; case 6: {y=b*d;x=a*c;} printf(" %d/%d*%d/%d=",a,b,c,d);break; case 7: {y=b*c;x=a*d;} printf(" %d/%d/%d/%d=",a,b,c,d);break; default: printf("something is wrong! "); break; } printf(" "); scanf("%d",&k); } return 0; }