How to write a programme in c to calculate the area of circle?

Answer

We can use any method. As we can find out the area of the circle by three methods as i known.
1.ordinary programming
e.g.

void main()

{
int r;float area;
printf("\n\tEnter radius of the circle : ");

scanf("%d",&r);

area=3.14*r*r;

printf("Radius = %d and area=%f",r,area);

}

2. By using macros

e.g. #define PI 3.14
#define AREA(x) PI*x*x

3. We can solve by user defined functions also

First answer by Janugiraman. Last edit by Janugiraman. Contributor trust: 26 [recommend contributor]. Question popularity: 10 [recommend question]

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