break.c

C Primer Plus(第五版)中文版,不用多说了

/* break.c -- uses break to exit a loop */
#include <stdio.h>
int main(void)
{
    float length, width;

    printf("Enter the length of the rectangle:\n");
    while (scanf("%f", &length) == 1)
    {
        printf("Length = %0.2f:\n", length);
        printf("Enter its width:\n");
        if (scanf("%f", &width) != 1)
            break;
        printf("Width = %0.2f:\n", width);
        printf("Area = %0.2f:\n", length * width);
        printf("Enter the length of the rectangle:\n");
    }
    printf("Done.\n");
   
    return 0;
}