2.c

/**
 * @brief I thought the following program was a perfect C program. But on compiling, I found a silly mistake. Can you find it out (without compiling the program :-) ?
 * @file 2.c
 */

#include<stdio.h>

void OS_Solaris_print()
{
    printf("Solaris - Sun Microsystems\n");
}

void OS_Windows_print()
{
    printf("Windows - Microsoft\n");

}
void OS_HP-UX_print()
{
    printf("HP-UX - Hewlett Packard\n");
}

int main()
{
    int num;
    printf("Enter the number (1-3):\n");
    scanf("%d",&num);
    switch(num)
    {
        case 1:
            OS_Solaris_print();
            break;
        case 2:
            OS_Windows_print();
            break;
        case 3:
            OS_HP-UX_print();
            break;
        default:
            printf("Hmm! only 1-3 :-)\n");
            break;
    }

    return 0;
}