求100~999的 水仙花数

#include<cstdio>
#include<iostream>

int main()
{
    int x,y,z,n;
    x=1;
    y=0;
    z=0;
    n==100*x+10*y+z;
    
    for (x=1;x<=9;x++)
    for (y=0;y<=9;y++)
    for (z=0;z<=9;z++)
    for (n=100;n<=999;n++)
    
    if (n==x*x*x+y*y*y+z*z*z)
    printf("%d\n",n);     
    
    return 0;
}