#include<stdio.h>
//function for addition
int add(int x,int y)
{
    int z;
    z=x+y;
    return z;
}
//funtion for multification
int multi(int x,int y)
{
    int z;
    z=x*y;
    return z;
}
//funtion for substration
int sub(int x,int y)
{
    int z;
    z=x-y;
    return z;
}
//funtion for devaition
float dev(float x,float y)
{
    float z;
    z=x/y;
    return z;
}
int main()
{ //declare variable
    double a,b,c,d;
    int ch;
    //input for geting oparent
    printf("which operate you want to use?\nInput the number:\n1:+\n2:-\n3:*\n4:/\n");
    scanf("%d",&ch);
    
    //Input section
    printf("Input first number:");
    scanf("%lf",&a);
    
    printf("Input 2nd number:");
    scanf("%lf",&b);
    //caling variable

    if(ch==1)
    {
        d=add(a,b);
        printf("The addition is:%d",d);
    }
    else if(ch==2)
    {
        d=sub(a,b);
        printf("The substraction is:%d",d);
    }
    else if(ch==3)
    {
        d=multi(a,b);
        printf("The multification is:%d",d);
    }
    else if(ch==4)
    {
        d=dev(a,b);
        printf("The divadation is:%.2f",d);
    }
    else
        d=printf("Wrong Input\n");

    return 0;
}