用switch case求几何图形的面积的C程序
问题
使用switchcase语句求矩形、正方形、三角形、圆形的面积，用户需要在运行时输入底、高、边、半径、宽和长来计算所有几何图形的面积。
解决方案
下面解释了使用switchcase语句查找矩形、正方形、三角形、圆形区域的解决方案-
公式
计算各个几何图形的面积的公式如下-
长方形的面积=宽*长；
的面积平方=侧*侧;
圆的面积=3.142*radius*radius；
三角形面积=0.5*底*高；
示例
以下是使用switchcase语句查找矩形、正方形、三角形、圆形区域的C程序-
#include输出结果void main(){ int fig_code; float side, base, length, breadth, height, area, radius; printf("-------------------------\n"); printf(" 1 --> Circle\n"); printf(" 2 --> Rectangle\n"); printf(" 3 --> Triangle\n"); printf(" 4 --> Square\n"); printf("-------------------------\n"); printf("Enter the Figure code\n"); scanf("%d", &fig_code); switch(fig_code){ case 1: printf(" Enter the radius\n"); scanf("%f",&radius); area=3.142*radius*radius; printf("Area of a circle=%f\n", area); break; case 2: printf(" Enter the breadth and length\n"); scanf("%f %f",&breadth, &length); area=breadth *length; printf("Area of a Rectangle=%f\n", area); break; case 3: printf(" Enter the base and height\n"); scanf("%f %f", &base, &height); area=0.5 *base*height; printf("Area of a Triangle=%f\n", area); break; case 4: printf(" Enter the side\n"); scanf("%f", &side); area=side * side; printf("Area of a Square=%f\n", area); break; default: printf(" Error in figure code\n"); break; } }
执行上述程序时，会产生以下结果-
Run 1: ------------------------- 1 --> Circle 2 --> Rectangle 3 --> Triangle 4 --> Square ------------------------- Enter the Figure code 3 Enter the base and height 4 7 Area of a Triangle=14.000000 Run 2: ------------------------- 1 --> Circle 2 --> Rectangle 3 --> Triangle 4 --> Square ------------------------- Enter the Figure code 1 Enter the radius 8 Area of a circle=201.087997