Using the pointer to find the maximum value

This problem required to achieve a simple function to find the maximum of two numbers.

Function interface definition:

void findmax( int *px, int *py, int *pmax );

Wherein the user px and py are two integers passed a pointer. Find the maximum of the function should be an integer of two findmax pointer points is, stored in the location pointed to pmax.

Referee test program Example:

#include <stdio.h>

void findmax( int *px, int *py, int *pmax );

int main()
{	
    int max, x, y; 

    scanf("%d %d", &x, &y);
    findmax( &x, &y, &max );
    printf("%d\n", max);

    return 0;
} 

/* 你的代码将被嵌在这里 */

Sample input:

3 5

Sample output:

5

void findmax( int *px, int *py, int *pmax )
{
	*pmax=*px;
	if(*px<*py)
	{
		*pmax=*py;
	}
}