Question

我是C的新手，并且有一个基本程序会向用户询问一个数字，然后打印这个数字以及它所在的范围，例如1-49。

Answer 1

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

int main(int argc, char **argv)
{
    int n;

    do {
        // Read the number into n
        printf("Enter a number: ");
        if (scanf("%d", &n) != 1) {
            perror("scanf");
            exit(EXIT_FAILURE);
        }

        // Check arbitrary condition
        if (n >= 1 && n <= 49) {
            printf("%d is in the range 1-49\n", n);
        }
    } while (n != 0);

    return EXIT_SUCCESS;
}

Answer 2

#include <stdio.h>

int main() {
    for (;;) {
        printf("Enter a number: ");

        char buf[10];
        fgets(buf, 10, stdin);
        printf("You entered %s\n", buf);

        // Code for displaying the range

        if (buf[0] == '0')
            break;
    }

    printf("Outside the loop\n");
    return 0;
}

如何用0结束循环？

2 个答案: