c ctrl-c signal

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#include <stdio.h>#include <signal.h>/* Signal Handler for SIGINT */void sigintHandler(int sig_num){    /* Reset handler to catch SIGINT next time.       Refer http://en.cppreference.com/w/c/program/signal */    signal(SIGINT, sigintHandler);    printf("\n Cannot be terminated using Ctrl+C \n");    fflush(stdout);}int main (){    /* Set the SIGINT (Ctrl-C) signal handler to sigintHandler        Refer http://en.cppreference.com/w/c/program/signal */    signal(SIGINT, sigintHandler);    /* Infinite loop */    while(1)    {            }    return 0;}

Ouput: When Ctrl+C was pressed two times

  Cannot be terminated using Ctrl+C  Cannot be terminated using Ctrl+C