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#include "stdio.h"   
void main()
{
  int x,y,w,z;
  printf("please input three number:\n");
  scanf("%d,%d,%d",&x,&y,&w);
  z=max(x,y,w);
  printf("The max number is %d",z);
  printf("\n");
  printf("ID number:2013304125");  
}
  int max(int a,int b , int c,int n)
{
n=a;
if (a<b) n= b;
if (b<c) n= c;
return n;

}