退出随时循环 [英] Exit a loop at anytime

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本文介绍了退出随时循环的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我想退出由pressing任意键在任何时候一个循环我想要的。我试过低于code,但它无法做到的。得需要你的帮助。先谢谢你。我使用的是C-免费5.0。

 的#include<&stdio.h中GT;
#包括LT&;&stdlib.h中GT;
#包括LT&;&time.h中GT;INT主要(无效)
{
    INT B = 0,I;
    INT秒;
    的printf(秒\\ n输入数字:);
    scanf函数(%d个,&安培;秒);
    而(B == 0)
    {
        对于(i = 1; I< =秒;我++)
        {
            time_t的结束=时间(0)+ 1;
            而(时间(0)LT端)
            ;
            秒 - = 1;
            的printf(秒数留下数:%d \\ n,秒);
            B =的kbhit();
        }        如果(秒== 0)
        {
            出口(0);
        }
    }
    的printf(剩余秒数留下数:%d \\ n,秒);
}


解决方案

您是忙等待,在while循环最里面。这可能不是最好的解决办法,但如果这是你想要做什么,你需要在这个循环添加一个测试,以检查是否有键被击中了。

I'm trying to exit a loop at anytime I want by pressing any key. I've tried the code below but it can't be done. Gotta need your help. Thank you in advance. I'm using a C-Free 5.0.

#include <stdio.h>
#include <stdlib.h>
#include <time.h>

int main(void)
{
    int b=0, i;
    int seconds;
    printf("\nEnter number of seconds : ");
    scanf("%d", &seconds);
    while (b==0)
    {
        for(i=1;i<=seconds;i++)
        {
            time_t end = time(0) + 1;
            while(time(0) < end)
            ;
            seconds -= 1;
            printf("Number of seconds left : %d\n", seconds);
            b=kbhit();
        }

        if(seconds == 0)
        {
            exit(0);
        }
    }
    printf("Number of remaining seconds left : %d\n", seconds);
}

解决方案

You are "busy-waiting" in the innermost while loop. That might not be the best solution, but if that is what you want to do, you need to add a test in that loop to check if a key has been hit.

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