flush.c

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/**
 * flush.c
 *
 * Demonstrates flushing the stdout buffer in C
 *
 * Compile:  gcc -g -Wall -o flush flush.c
 * Run:      ./flush
 *
 *           To measure performance, run with the time command:
 *               time ./flush
 */

#include <stdio.h>

int main() {

    int i;
    for (i = 0; i < 1000000; ++i) {
        printf("%d ", i);
        /* We'll flush the output here. This ensures that everything has been
         * printed to the terminal before continuing -- useful for debugging. */
        fflush(stdout);
    }

    return 0;
}