简单的四则运算

 1 #include<stdio.h>
 2 #include<cstdlib>
 3 #include<iostream>
 4 #include<ctime>
 5 using namespace std;
 6 int random(int Max)
 7 {
 8 return rand()%Max;
 9 }
10 int main()
11 {
12 char sign[4]={‘+‘,‘-‘,‘*‘,‘/‘};
13 int n=300;
14 while(n--)
15 {
16 
17 printf("%d %c %d %c %d %c %d %c %d =\n",
18 random(100),sign[random(4)],random(100),sign[random(4)],
19 random(100),sign[random(4)],random(100),sign[random(4)],
20 random(100)
21 );
22 }
23 return 0;
24 
25 }