initalsFunction.c

/*CS50 pset2 Jason Leone */
// File initalsFunction.c

#include <cs50.h>
#include <ctype.h>
#include <stdio.h>
#include <string.h>

// prototype functions
char Initials1(string userName);
char Initials2(string userName);

int main(void)
{
    // get userName with GetString
    string userName = GetString();

    // pass argument userName to functions
    Initials1(userName);
    Initials2(userName);

    // gets return value of x (first initial) from function Initials1
    char x = Initials1(userName);

    // gets return value of y (second initial) from function Initials2
    char y = Initials2(userName);

    // prints x and y (first and last initial) and uses toupper to case correct
    printf("%c", toupper(x));
    printf("%c", toupper(y));
    printf("\n");
}

// function to get first initial from the array

char Initials1 (string userName)
{
    // declare the variable
    char x;

    // loop getting the length of string with strlen
    for (int i = 0, n = strlen(userName); i < n; i++)
    {
        // get the first letter in the array and assign it to x
        if (userName[0])
        {
            x = (userName[0]);
        }
    }

    // return the value of x (the first initial) to main
    return x;
}

// function to get the second initial from the array
char Initials2 (string userName)
{
    //declare the variable
    char y;

    for (int i = 0, n = strlen(userName); i < n; i++)
    {
        // find the letter in the array after the space and assign it to y
        if (userName[i] == ' ' && userName[i + 1])
        {
            y = (userName[i + 1]);
        }
    }

    // return the value of y (the second initial) to main
    return y;
}