Area

// Area of circle,triangle,formula & interest in one program
#include<stdio.h>
#include<conio.h>
#define PI 3.14
void main()
{
int a,r,l,b,f,g,i,p,n,ch;
clrscr();
printf("\n Which process do you want?");
printf("\n 1.Area of circle");
printf("\n 2.Area of triangle");
printf("\n 3.Formula");
printf("\n 4.Simple Interest");
printf("\n Your Choice:-");
scanf("%d",&ch);
if(ch==1)
{
printf("\n Enter radius:-");
scanf("%d",&r);
a=PI*r*r;
printf("\n Area of circle is %d",a);
}
else if(ch==2)
{
printf("\n Enter length:-");
scanf("%d",&l);
printf("\n Enter base:-");
scanf("%d",&b);
a=0.5*l*b;
printf("\n Area of triangle is %d",a);
}
else if(ch==3)
{
printf("\n Enter f:-");
scanf("%d",&f);
printf("\n Enter g:-");
scanf("%d",&g);
a=(f+g)*(f+g);
printf("\n Answer of formula is %d",a);
}
else if(ch==4)
{
printf("\n Enter p:-");
scanf("%d",&p);
printf("\n Enter r:-");
scanf("%d",&r);
printf("\n Enter n:-");
scanf("%d",&n);
i=p*r*n/100;
printf("\n Simple interest is %d",i);
}
else
{
printf("\n Invalid Choice");
}
printf("\n Good Bye");
}