Question

How can I write a code in c+using switch,to find the area,the perimeter of triangle,circle and square all in one?

Answer 1

What do you need finally? Which data do you have?

Answer 2

Create a switch depending on the type of figure of which area you want to calculate. Then in the corresponding switch case prompt user to input required data and then calculate the area and/or perimeter from it.

Answer 3

With my experiences with C++(I'm a new), I will recommend you to create distinct functions and classes, then execute it in main (you can use switch there).

#include <cmath>

double findCircleArea(double radius) {

    /* You can add more decimals to get more exactly */

    /* pow(double, double) is used for calculating squares */

    double circleArea = pow(radius, 2) * 3.14159265; 

    return circleArea;

}

double findSquareArea(double side) {

    double squareArea = pow(side, 2);

    return squareArea;

}

double findTriangleArea(double side) {

    double triangleArea = pow(side, 2) / 2;

    return triangleArea;

}

And for the perímetres you do the same. And then execute them on main function.