Question

In C

Write a main function with a function call to a function called GetLetter which has two double arguments/parameters. The function returns a character. Declare and initialize the necessary data variables and assign values needed to make it executable and to prevent a loss of information

Answer 1

Hello!

Formater for double is %lf

which means long float.

The function declaration and definition has done before the main function itself.

Functionality:

// GetLetter function

This function takes 2 double arguments and adds each other and assigns the result to another double variable c. And type conversion of this variable takes place which means converts double to char and returns this char.

Here we have used pass by value , means new address is allocated and the duplicate of values a and b is stored in new address. So because of this original value will not be effected and prevents the loss of information.

// Main function

Here the values a and b are taken from user and calls the function GetLetter by passing these a and b values.

And the returned value gets printed.

CODE:

#include <stdio.h>

char GetLetter(double a,double b){
    // takes a and b and added each other
    // and assigns to c
    double c = a + b;
    // returns the c after type casting
    // the double is converted to equivalent 
    return ((char)c);
}

int main() {

    double a,b;
    char letter;
    // asks user for a and b
    printf("Enter a and b: ");
    // gets a and b
    scanf("%lf %lf",&a,&b);
    
    printf("%lf & %lf\n",a,b);
    // calls the GetLetter func and returns 
    // the char to letter char variable
    letter = GetLetter(a,b);
    // prints the letter 
    printf("the letter is %c",letter);
    
    return 0;
    
}

OUTPUT:

Hope this helps and clear.

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