Thread: Good afternoon, I encountered some error when using getchar() and putchar(), pls help

This is my code.

Code:

#include <stdio.h>
#include <stdlib.h>

main()
{
    char firstchar, secondchar, thirdchar;
    
    printf("Enter 1st character > ");
    firstchar = getchar();
    printf("\n");
    fflush(stdin);

    printf("Enter 2nd character > ");
    secondchar = getchar();
    printf("\n");
    fflush(stdin);

    printf("Enter 3rd character > ");
    thirdchar = getchar();
    printf("\n");
    fflush(stdin);

    printf("You have entered: ");
    putchar(firstchar);
    putchar(secondchar);
    putchar(thirdchar);
    system("pause");
    return 0;
}

And this is my output:

Code:

Enter 1st character > A

Enter 2nd character >
Enter 3rd character > B

You have entered: A
BPress any key to continue . . .

As you see, I only able to enter 2 value, even I use fflush(stdin) before reading others character.
P.S. I using Microsoft Visual Studio 2015 to compile.

Don't define main like that, FAQ > main() / void main() / int main() / int main(void) / int main(int argc, char *argv[]) - Cprogramming.com

Don't use "fflush(sdtin);", FAQ > Why fflush(stdin) is wrong - Cprogramming.com

Your problem is that "getchar()" returns all the characters you typed, and one of them is the newline character( it's entered when you press Return/Enter ). If you want to ignore those whitespace character, you can use scanf, like this:

Code:

scanf(" %c", &firstchar);

note the extra space before the percent sign, that's important as it tells scanf to ignore all whitespace characters.