C Primer Plus 第六版(中文版)第五章(完美版)编程练习答案

//本博主所写的代码仅为阅读者提供参考;
//若有不足之处请提出，博主会尽所能修改;
//附上课后编程练习题目;


//5.11 - 1.c

#include <stdio.h>
#define MIN_PER_HOUR 60

int main(void)
{
    int m, hour, min;

    printf("请输入分钟数(<=0退出):");
    while ((scanf("%d", &m) == 1) && (m > 0))
    {
        hour = m / MIN_PER_HOUR;
        min = m % MIN_PER_HOUR;
        printf("%d分钟相当于%d小时%d分钟\n", m, hour, min);
        printf("您可以再次输入分钟数(<=0退出):");
    }
    printf("本程序完成!\n");

    return 0;
}

//-------------

//5.11 - 2.c

#include <stdio.h>
#define LEN 10

int main(void)
{
    int n;
    int i = 0;

    printf("请您输入一个整数:");
    scanf("%d", &n);

    printf("打印从%d到比%d大10的所有整数是:\n", n, n);
    while (i <= LEN)
    {
        printf("%d\n", n + i);
        i++;
    }
    printf("本程序完成!\n");

    return 0;
}

//-------------

//5.11 - 3.c

#include <stdio.h>
#define DAYS_PER_WEEK 7

int main(void)
{
    int n, week, days;

    printf("Please enter days(<=0 to quit):");
    while ((scanf("%d", &n) == 1) && (n > 0))
    {
        week = n / DAYS_PER_WEEK;
        days = n % DAYS_PER_WEEK;
        printf("%d days are %d weeks, %d days.\n", n, week, days);
        printf("You can enter again(<=0 to quit):");
    }

    return 0;
}

//-------------

//5.11 - 4.c

#include <stdio.h>
#define CM_PER_INCH 2.54f
#define CM_PER_FEET 30.48f

int main(void)
{
    int feet;
    float cm, inch;

    printf("Enter a height in centimeters:");
    while ((scanf("%f", &cm) == 1) && (cm > 0))
    {
        feet = (int)(cm / CM_PER_FEET);
        inch = (cm - CM_PER_FEET * feet) / CM_PER_INCH;
        printf("%.1f cm = %d feet, %.1f inches\n", cm, feet, inch);
        printf("Enter a height in centimeters(<=0 to quit):");
    }
    printf("bye\n");

    return 0;
}

//-------------

//5.11 - 5.c

#include <stdio.h>

int main(void)
{
    int n, sum, count;
    sum = 0;

    printf("Enter the number of days you work:");
    scanf("%d", &count);
    n = count;
    while (count > 0)
    {
        sum += count;
        count--;
    }
    printf("You earned $%d in %d days.\n", sum, n);

    return 0;
}

//-------------

//5.11 - 6.c

#include <stdio.h>

int main(void)
{
    int n, sum, count;
    sum = 0;

    printf("Enter the number of days you work:");
    scanf("%d", &count);
    n = count;
    while (count > 0)
    {
        sum += count * count;
        count--;
    }
    printf("You earned $%d in %d days.\n", sum, n);

    return 0;
}

//-------------

//5.11 - 7.c

#include <stdio.h>

void cube(double c);

int main(void)
{
    double n;

    printf("Please you enter a double number:");
    scanf("%lf", &n);
    cube(n);

    return 0;
}

void cube(double c)
{
    printf("The cube of %g is %g.\n", c, c * c * c);
    return;
}

//-------------

//5.11 - 8.c

#include <stdio.h>

int main(void)
{
    int f_o, s_o;

    printf("This program computes moduli.\n");
    printf("Enter an integer to serve ");
    printf("as the second operand:");
    scanf("%d", &s_o);
    printf("Now enter the first operand:");
    while ((scanf("%d", &f_o) == 1) && (f_o > 0))
    {
        printf("%d %% %d is %d\n", f_o, s_o, f_o % s_o);
        printf("Enter next number for first operand(<= 0 to quit):");
    }
    printf("Done\n");

    return 0;
}

//-------------

//5.11 - 9.c

#include <stdio.h>

void Temperatures(double f_t);

int main(void)
{
    double temp;

    printf("请输入一个温度(或按q退出):");
    while (scanf("%lf", &temp) == 1)
    {
        Temperatures(temp);
        printf("您可以再次输入一个温度(按q退出):");
    }
    printf("本程序完成!\n");

    return 0;
}

void Temperatures(double f_t)
{
    const double f_val = 32.0;
    const double k_val = 273.16;
    double t = 5.0 / 9.0 * (f_t - f_val);
    //↑摄氏温度 = 5.0/9.0 * (华氏温度 - 32);
    double k_t = t + k_val;
    //↑开氏温度 = 摄氏温度 + 273.16;
    printf("摄氏温度:%.2lf°C\n", t);
    printf("华氏温度:%.2lf°C\n", f_t);
    printf("开氏温度:%.2lf°C\n", k_t);

    return;
}

//-------------

//----------------------------2020年4月3日 -------------------------------