#include <stdio.h>
#include <signal.h>
#include <stdarg.h>

void intermithandler(int signumber);
void continuehandler(int signumber);
void terminatehandler(int signumber);

int main(void)
{
    	char  buffer1[100], buffer2[100];
    	int i;

    	if(signal(SIGINT,&terminatehandler)==SIG_ERR)
    	{
        	printf("Couldn’t register signal handler for SIGINT! \n");
    	}
    	if(signal(SIGTSTP,&terminatehandler)==SIG_ERR)
    	{
        	printf("Couldn’t register signal handler for SIGTSTP! \n");
   	}
    	if(signal(SIGCONT,&continuehandler)==SIG_ERR)
    	{
        	printf("Couldn’t register signal handler for SIGCONT! \n");
    	}
    	if(signal(SIGTERM,&terminatehandler)==SIG_ERR)
    	{
        	printf("Couldn’t register signal handler for SIGTERM! \n");
    	}
    
    	printf("Pid of This Process:%6d.", getpid());

    	for( ; ; )
    	{
        	fgets(buffer1, sizeof(buffer1), stdin);
        	for(i=0; i<100; i++)
        	{
             		if(buffer1[ i ]>=97&&buffer1[ i ]<=122)
                 		buffer2[ i ]=buffer1[ i ]-32;
             		else
                 		buffer2[ i ]=buffer1[ i ];
        		printf("Your input is: %s\n\n", buffer2);
     		}
	}
     	return 0;
}

void intermithandler(int signumber)
{
   	printf("catch signal %d.;\n",signumber);
}

void continuehandler(int sinnumber)
{
   	printf("Continue code.\n");
}
void terminatehandler(int signumber)
{
	printf("signal SIGTERM.\n");
    	exit(0);
}