我如何...运行这个程序试图学习C编程 [英] How do i...run this program trying to learn C programming

问题描述

/* local variable definition */
int max(int num1, int num2);
 
int main () {

  
  int a = 100;
   int b = 200;
   int ret;
 
   /* calling a function to get max value */
   ret = max(a, b);
 
   printf( "Max value is : %d\n", ret );
 
   return 0;
//error is underdefined reference to max
//1 id returned 1 exit status
}

我尝试过：



/ *本地变量定义* /

int max（int num1，int num2）;



int main（）{





int a = 100;

int b = 200;

int ret;



/ *调用函数获取最大值* /

ret = max（a，b）;



printf（最大值是：％d \ n，ret）;



返回0;

//错误未定义参考max

// 1 id返回1退出状态

}

What I have tried:

/* local variable definition */
int max(int num1, int num2);

int main () {


int a = 100;
int b = 200;
int ret;

/* calling a function to get max value */
ret = max(a, b);

printf( "Max value is : %d\n", ret );

return 0;
//error is underdefined reference to max
//1 id returned 1 exit status
}

推荐答案

#include <stdio.h>

int max(int num1, int num2)
{
   int result;
 
   if (num1 > num2)
      result = num1;
   else
      result = num2;
 
   return result; 
};

int main() {
int a = 100;
int b = 200;
int ret;

/* calling a function to get max value */
ret = max(a, b);

printf( "Max value is : %d\n", ret );

return 0;
}

max 不是C中的内置函数 - 您需要定义你自己。

在 main 函数上方添加这一行的最简单方法是：

max is not a built in function in C - you need to define it yourself.
The simplest way it to add this line just above the main function:

#define max(a, b) (a >= b ? a : b)

#include <stdio.h>

/* max function declaration */
int max(int num1, int num2);

int main ()
{
  int a = 100;
  int b = 200;
  int ret;

  /* calling a function to get max value */
  ret = max(a, b);
  printf( "Max value is : %d\n", ret );

  return 0;
}


/* max function definition */
int max( int num1, int num2)
{
  return num1 > num2 ? num1 : num2;
}

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