如何用0結束循環？

Question

我是C新手，他有一個基本程序，要求用戶輸入一個數字，然後打印這個數字以及它在1-49的範圍。

Answer 1

#include <stdio.h> 

int main() { 
    for (;;) { 
     printf("Enter a number: "); 

     char buf[10]; 
     fgets(buf, 10, stdin); 
     printf("You entered %s\n", buf); 

     // Code for displaying the range 

     if (buf[0] == '0') 
      break; 
    } 

    printf("Outside the loop\n"); 
    return 0; 
} 

Answer 2

#include <stdlib.h> 
#include <stdio.h> 

int main(int argc, char **argv) 
{ 
    int n; 

    do { 
     // Read the number into n 
     printf("Enter a number: "); 
     if (scanf("%d", &n) != 1) { 
      perror("scanf"); 
      exit(EXIT_FAILURE); 
     } 

     // Check arbitrary condition 
     if (n >= 1 && n <= 49) { 
      printf("%d is in the range 1-49\n", n); 
     } 
    } while (n != 0); 

    return EXIT_SUCCESS; 
}