18、C 编程：从基础到实践

C 编程：从基础到实践

1. 矩形计算程序示例

下面是一个用于计算矩形周长、面积和体积的程序代码：

#include <stdio.h>

void perimeter(float l, float w)
{
    printf("\nPerimeter is %.2f\n", (2*l) + (2*w));
}

void area(float l, float w)
{
    printf("\nArea is %.2f\n", l * w);
}

void volume(float l, float w, float h)
{
    printf("\nThe volume is %.2f\n", l * w * h);
}

main()
{
    int selection = 0;
    float l,w,h;

    printf("\nThe Function Wizard\n");
    printf("\n1\tDetermine perimeter of a rectangle\n");
    printf("2\tDetermine area of a rectangle\n");
    printf("3\tDetermine volume of rectangle\n");
    printf("\nEnter selection: ");
    scanf("%d", &selection);

    switch (selection) {
        case 1:
            printf("\nEnter length: ");