C :

#include<stdio.h>
void main(){
int i;
for(i=100;i<=999;i++){
int a=i%1000/100;
int b=i%100/10;
int c=i%10/1;
if(a*a*a+b*b*b+c*c*c==i){
printf("%d\n",i);	
	
}	
	
	
}	
	
	
}

C++ :

#include<iostream>
#include<math.h>
using namespace std;
int main(){
    int i = 100;
    while(i <= 999){ 
 int a = i / 100;
 int b = i / 10 % 10;
 int c = i % 10;
 if(a * a * a + b * b * b + c * c * c == i){ 
    cout<<i<<endl;
 }
 i++;
}
return 0;
}

Python :

for n in range(100,1000):
    a=n//100
    b=n//10%10
    c=n%10
    if n==a*a*a+b*b*b+c*c*c:
        print(n)