Unit 1.2 Arithmetic operation on floating point numbers

#include <stdio.h>

int main()
{
    float f1,f2,ans;
    printf("Enter two floating point numbers ");
    scanf("%f %f",&f1,&f2);
    int e1 , e2;
    printf("Enter two integer numbers ");
    scanf("%d %d",&e1,&e2);
    // printf("\n%d %d\n",e1,e2);
    printf("\nEnter operator 1 = +, 2 = -, 3 = *, 4 = / ");
    int  c ;
    scanf("%d",&c);
    if (e1>e2){
        while(e1!=e2){
            f2/=10;
            e2++;
        }
    }
    else if (e1<e2){
        while(e1!=e2){
            f1/=10;
            e1++;
        }
    }
    printf("\n%f %d %f %d \n",f1,e1,f2,e2);
    if(c==1) ans = f1+f2;
    else if (c==2)  ans = f1-f2; // here
    else if (c==3)  ans = f1*f2;
    else if (c==4)  ans = f1/f2;
    else {
        printf("Wrong choice");
        return 0;
    }
    int e=e1;
    if (ans>=1){
        while(ans>=1){
            ans/=10;
            e++;
        }

    }
    else if (ans<=0.1){
        while(ans<=0.1){
            ans*=10;
            e--;
        }
    }

    printf("Result %f X 10^%d",ans,e);
    return 0;
}