Scanf function causing infinite loop

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I have a simple code that converts a char in a int within a loop while, but when I execute and place the first char, the program goes into loop infinite, here comes the code:

#include <stdio.h>
int main()
{
   char c;

   while (1)
   {
       printf("Enter a character: ");
       if (scanf("%c", &c) == 0)
           printf("Err");

       printf("The numeric form of %c is %d\n", c, c);
   }

   return 0;
}
c

  • is not the scanf that cause infinite loop, is itself while. With while(1) how will it exit the loop? 1 will never cease to be 1

1 answer

1

The code has no stopping condition. From what I understand, you want to leave the loop when the user type 0.

while (1)
{
   printf("Enter a character: ");
   if (scanf("%c", &c) == 0) {
       printf("Err");
       break;
   }

   printf("The numeric form of %c is %d\n", c, c);
}

A simple alternative to this is, after being displayed the error message, you use the command break, which closes the loop and "follows the flow", to end the application.

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