[FIXED] printf() not working before do while loop

Issue

I tried to ran this code :

printf("Enter a character.");
printf("\n");

do {
    ch = getch();
    system("cls");
    putchar(ch);
} while(ch != '.');

The above code works fine on Codeblocks but it is not working on Eclipse IDE. In fact the printf statement before do while loop is not working, but if I disable do while statement the printf statement working fine on eclipse. Could you explain why is this happening ?

Solution

Maybe try this?

printf("Enter a character.\n");
fflush(stdout);

do {
    ch = getch();
    system("cls");
    putchar(ch);
} while(ch != '.');

I think it's because your output buffer (printf) is not flushed.

Answered By - Ashhar Shah