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| #include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <time.h>
#include <unistd.h>
void handler(int signum){
puts("Timeout");
_exit(1);
}
int main()
{
setvbuf(stdout, 0, 2, 0);
setvbuf(stdin, 0, 2, 0);
signal(SIGALRM, handler);
alarm(90);
unsigned seed = (unsigned)time(NULL);
srand(seed);
unsigned int magic;
printf("Give me the magic number :)\n");
read(0, &magic, 4);
if (magic != 3735928559) {
printf("Bye~\n");
exit(0);
}
printf("Complete 1000 math questions in 90 seconds!!!\n");
for (int i = 0; i < 1000; ++i) {
int a = random() % 65535;
int b = random() % 65535;
int c = random() % 3;
int ans;
switch(c) {
case 0:
printf("%d + %d = ?", a, b);
scanf("%d", &ans);
if (ans != a + b) {
printf("Bye Bye~\n");
exit(0);
}
break;
case 1:
printf("%d - %d = ?", a, b);
scanf("%d", &ans);
if (ans != a - b) {
printf("Bye Bye~\n");
exit(0);
}
break;
case 2:
printf("%d * %d = ?", a, b);
scanf("%d", &ans);
if (ans != a * b) {
printf("Bye Bye~\n");
exit(0);
}
break;
}
}
printf("Good job!\n");
system("sh");
return 0;
}
|
