要求：用程序实现随机生成三十道100以内的四则运算题。
由c++编写，循环输出两个随机数以及随机数中间的运算符号变量，程序结束
1 #include<iostream> 2 #include<string> 3 using namespace std; 4 5 int main() 6 { 7 int x, y, a; 8 string b; 9 for (int i=0; i < 30; i++) 10 { 11 x = rand() % 100; 12 y = rand() % 100; 13 a = rand() % 4; 14 switch (a) 15 { 16 case 0:b = "+"; break; 17 case 1:b = "-"; break; 18 case 2:b = "*"; break; 19 case 3:b = "/"; 20 } 21 cout << x+1 << " " << b << " " << y+1 << " =" << endl; 22 } 23 system ("pause"); 24 return 0; 25 }
实现截图：
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