函数与指针求大者

#include <iostream>

/* run this program using the console pauser or add your own getch, system("pause") or input loop */
using namespace std;
int main(int argc, char** argv) {
    int max(int x,int y);
    int a,b,m;
    cin>>a>>b;
    m=max(a,b);
    cout <<"max="<<m<<endl;
    return 0;
}

int max(int x,int y)
{
    int z;
    if(x>y)z=x;
    else z=y;
    return(z);
}