Approach-1:
- Simple menu driven programs are very helpful to students in application development.
- In this code, we created a simple menu used to perform all computational operations on geometrical shapes
- In this approach, we execute the code only once with choice.
#include <stdio.h>
int main()
{
int ch,r,l,w,b,h;
float area;
printf("Area of Circle\n");
printf("Area of Rectangle\n");
printf("Area of Triangle\n");
printf("Enter your choice : ");
scanf("%d",&ch);
switch(ch)
{
case 1: printf("Input radious of the circle : ");
scanf("%d",&r);
area=3.14*r*r;
break;
case 2: printf("Input length & width : ");
scanf("%d%d",&l,&w);
area=l*w;
break;
case 3: printf("Input the base and height triangle :");
scanf("%d%d",&b,&h);
area=.5*b*h;
break;
}
printf("The area is : %f\n",area);
return 0;
}
Approach-2:
- In this approach, we execute the logic with Iterators(while loop) until user enter the choice “quit”.
- Student need not to run the code every time to calculate the area of shapes. In a single run, we can repeat the code as many as times required.
#include <stdio.h>
void circle();
void rectangle();
void triangle();
int ch,r,l,w,b,h;
int main()
{
while(1)
{
printf("1. Area of Circle\n");
printf("2. Area of Rectangle\n");
printf("3. Area of Triangle\n");
printf("4. Quit\n");
printf("Enter your choice : ");
scanf("%d",&ch);
switch(ch)
{
case 1: circle();
break;
case 2: rectangle();
break;
case 3: triangle();
break;
case 4: exit(1);
default: printf("Invalid choice\n\n");
}
}
return 0;
}
void circle(){
float area;
printf("Input radious of the circle : ");
scanf("%d",&r);
area=3.14*r*r;
printf("The area is : %f\n",area);
}
void rectangle(){
float area;
printf("Input length & width : ");
scanf("%d%d",&l,&w);
area=l*w;
printf("The area is : %f\n",area);
}
void triangle(){
float area;
printf("Input the base and hight :");
scanf("%d%d",&b,&h);
area=.5*b*h;
printf("The area is : %f\n",area);
}
