Question

How to return nothing from a void function to stop running the function in C

Answer 1

#include <stdio.h>

void info(const char *message)
{
  if (NULL == message)
  {
    return; // return nothing, skip the code below, stop running the function
  }

  fprintf(stderr, "%s:%d %s\n", __FILE__, __LINE__, message);
}
int main(void)
{
    info(NULL);
    
    return 0;
}

   
/*
run:
 

*/

 

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