CS计算机代考程序代写 #include

#include
#include
#include

#define TIMEOUT 5
#define MAXTRIES 5
#define LINESIZE 100
#define CTRL_G ‘\007’
#define TRUE 1
#define FALSE 0

//enter something from keyboard within 5 second, maximum 5 tries

static int timed_out;

static char answer[LINESIZE];

void catch (int sig){

timed_out = TRUE;

puts(“hurry up\n”);
}

char *quickreply(char *prompt){

int ntries;

signal(SIGALRM, catch);

for (ntries = 0; ntries < MAXTRIES; ntries++) { timed_out = FALSE; printf("ntries=%d\n", ntries); printf("\n%s > “, prompt);

alarm(TIMEOUT);

gets(answer);

alarm(0);

if (!timed_out)
break;
}

signal(SIGALRM, SIG_DFL);

return (ntries == MAXTRIES ? ((char *)0) : answer);
}

int main(){

printf(” your input is: %s\n”, quickreply(“Enter:”));
}