【C Primer Plus】编程练习第五章

#include <stdio.h>
#include <string>
#define H_PER_M 60
int main()
{
    int min, hour;
    printf("请输入分钟数：");
    scanf("%d", &min);
    getchar();
    while (min > 0) {
        hour = min / H_PER_M;
        min = min % H_PER_M;
        printf("总共%d小时，%d分钟\n", hour, min);
        printf("请继续输入\n");
        scanf("%d", &min);
        getchar();
    }
    printf("结束");
    return 0;
}

#include <stdio.h>
#include <string>
#define H_PER_M 60
int main()
{
    int a,i;
    printf("请输入一个整数：");
    scanf("%d", &i);
    getchar();
    a = i + 10;
    printf("%d", i); //这是为了让*号只存在于两个数之间
    while (i<a) {
        printf("*");
        i++;
        printf("%d", i);
        
    }
    getchar();
    return 0;
}

#include <stdio.h>
#include <string>
int main()
{
    int weeks,days,day;
    printf("请输入工作天数：");
    scanf("%d", &days);
    getchar();
    weeks = days/7;
    day = days % 7;
    printf("%d days are %d weeks, %d days",days,weeks,day);
    getchar();
    return 0;
}

#include <stdio.h>
#include <string>
#define FEET (12*2.54)
#define INCH 2.54
int main()
{
    float cm = 0;
    int feet = 0;
    float inch = 0;
    printf("Enter a height in centimeters：");
    scanf("%f", &cm);
    getchar();
    while (cm > 0)
    {
        feet = cm / FEET;
        inch = (cm - feet*FEET) / INCH;
        printf("%0.1f cm = %d feet, %0.1f inches\n", cm, feet, inch);
        printf("Enter a height in centimeters (<=0 to quit) ：");
        scanf("%f", &cm);
        getchar();
    }
    printf("bye");
    getchar();
    return 0;
}