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Example

Following is the example of implementing a function the C programming language:

#include <stdio.h>
 
/* function declaration */
int max(int num1, int num2);
 
int main ()
{
   /* local variable definition */
   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;
}
 
/* function returning the max between two numbers */
int max(int num1, int num2) 
{
   /* local variable declaration */
   int result;
 
   if (num1 > num2)
      result = num1;
   else
      result = num2;
 
   return result; 
}

While running final executable, it would produce the following result:

Max value is : 200




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