#include <ctype.h>

char determineContents_if(char gasCode) {
    gasCode = toupper(gasCode); // Convert to uppercase

    if (gasCode == 'B')
        printf ("\nBrown - Carbon Monoxide\n");
    else if (gasCode == 'O')
        printf ("\n Orange - Ammonia\n");
    else if (gasCode == 'G')
        printf ("\nGreen - Oxygen\n");
    else if (gasCode == 'Y')
        printf ("\nYellow - Hydrogen\n");
    else
        printf ("\nInvalid Character\n");

    return 0;
}