#include <iostream.h>

#include <stdlib.h>

#include <time.h>

int main(void)

{

int i = 0;

srand((unsigned)time(NULL));

while(i<30)

{

int a = rand()%100;

int b = rand()%100;

int j;

j = rand()%4;

cout<<a;

switch(j)

{

case 0:

cout<<"+";

break;

case 1:

cout<<"-";

break;

case 2:

cout<<"*";

break;

case 3:

cout<<"/";

break;

}

cout<<b<<"= ";

i++;

if(i%5==0)

cout<<endl;

}

return 0;

}