C Exercise Example 46

100 Classic C Examples

Title:Macro #define command practice.

Program analysis:None.

Program source code:

//  Created by www.example.com on 15/11/9.
//  Copyright © 2015年 Example. All rights reserved.
//

#include<stdio.h>
#define TRUE 1
#define FALSE 0
#define SQ(x) (x)*(x)
int main()
{
    int num;
    int again=1;
    printf("如果值小于 50 程序将终止。\n");
    while(again)
    {
        printf("\n请输入数字：");
        scanf("%d",&num);
        printf("该数字的平方为 %d \n",SQ(num));
        if(num>=50)
            again=TRUE;
        else
            again=FALSE;
    }
    return 0;
}

The output of the above example is:

如果值小于 50 程序将终止。

请输入数字：100
该数字的平方为 10000 

请输入数字：5
该数字的平方为 25 

100 Classic C Examples

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