练习

#include <stdio.h>

void main()
{
    double a, b, c;
    printf("请输入长：");
    scanf("%lf", &a);
    printf("请输入宽：");
    scanf("%lf", &b);
    printf("请输入高：");
    scanf("%lf", &c);

    printf("A面面积：%.2lf\n", (a * b));
    printf("B面面积：%.2lf\n", (a * c));
    printf("C面面积：%.2lf\n", (b * c));
    printf("该长方形的体积：%.2lf\n", (a * b * c));
}

printf("请输入长 宽 高：");
scanf("%lf %lf %lf", &a, &b, &c);