随机产生3个整数的加减混合运算

随机产生3个整数的加减混合运算
注意windows.h头文件里的sleep

#include "stdio.h"
#include  
#include  
#include 
int * random()//Generate random numbers 1 to 20
{
	static int r[3];
	srand((unsigned int)time(NULL));//修改种子
	for (int i = 0; i < 3; i++)		
	{	
		r[i]=rand()%(20) + 1;//设置范围  1-20
		Sleep(500);	// windows.h
	}
	return r;
}
int * random01()//Generate random numbers 1 or 0
{
	static int rr[3];
	srand((unsigned int)time(NULL));//修改种子
	for (int i = 0; i < 3; i++)		
	{	
		rr[i]=rand();//设置范围  1-20
		Sleep(500);	// windows.h
	}
	return rr;
}
int main(int argc, char const *argv[])
{
	int *p;// build a pointer
	p=random();
	int *q;// build a pointer
	q=random01();
	char a[2]={'+','-'};
	printf("%d%c%d%c%d=",*(p+0),a[*(q+0)%2],*(p+1),a[*(q+1)%2],*(p+2));
	return 0;
}