Area

#include<stdio.h>
#include<math.h>
int main(){

int n,m;
float lengthSq,lengthRect,breadthRect,radius,base,height,pi=3.1416;
float area;

printf("Press 1 for proceeding and 2 for exiting the program....\n");

scanf("%d",&n);

if(n==1){

    printf("Ok, let's begin!!\n");
    printf("Press 1 for measuring the area of a Square.\n");
    printf("Press 2 for measuring the area of a Rectangle.\n");
    printf("Press 3 for measuring the area of a Circle.\n");
    printf("Press 4 for measuring the area of a Triangle.\n");

    scanf("%d",&m);

    if(m==1){
        printf("Enter the length of the square: ");
        scanf("%f",&lengthSq);
        area=pow(lengthSq,2);
        printf("Area: %f sq.unit\n",area);
    }

    else if(m==2){

        printf("Enter the length of the rectangle: ");
        scanf("%f",&lengthRect);
        printf("Enter the breadth of the rectangle: ");
        scanf("%f",&breadthRect);
        area=lengthRect*breadthRect;
        printf("Area: %f sq.unit\n",area);


    }

    else if(m==3){
        printf("Enter the raidus of the circle: ");
        scanf("%f",&radius);
        area=pi*radius*radius;
        printf("Area: %f sq.unit\n",area);
    }

    else if(m==4){

        printf("Enter the base of the triangle: ");
        scanf("%f",&base);
        printf("Enter the height of the triangle: ");
        scanf("%f",&height);
        area=(base*height)/2;
        printf("Area: %f sq.unit\n",area);
    }

    else{
        printf("Invalid Input!!");
    }


}

else if(n==2){

    printf("bye!!");
}

else{
    printf("Invalid Input!!");
}



return 0;
}