c - 如何消除c语言中的格式警告？

Question

#include <stdio.h> 
int main(void) { 
  int *pVar, var = 10;
  pVar = &var;
  //*pVar = var; 

  printf("value = %d, address = Ox%X\n", var, &var);    
  // Format specifies type 'unsigned int' but the argument has type 'int *' 
  
  printf("pValue = %d, address = Ox%X\n", *pVar, pVar);
  // Format specifies type 'unsigned int' but the argument has type 'int *' 

  *pVar = 20; 

  printf("value = %d, address = Ox%X\n", var, &var);
  // Format specifies type 'unsigned int' but the argument has type 'int *' 

  printf("pValue = %d, address = Ox%X\n", *pVar, pVar);
  // Format specifies type 'unsigned int' but the argument has type 'int *' 

  return 0; 
} 

我发现一些警告

格式指定类型 unsigned int 但参数类型为 int *

Even though the program runs as I intend, I want to know why this happen.

What should I do to remove those errors without making some errors in result?

Answer 1

您可以使用 %p 格式作为指针，如下

printf("value = %d, address = %p\n", var, (void *) &var);