백준(baekjoon)(BaekJoon)코딩 2577번:숫자의 개수 답

#include <iostream>
#include <string>
using namespace std;
int main() {
int arr[10] = { 0,0,0,0,0,0,0,0,0,0 };
int num ;
int mul = 1;
string k;
for (int i = 0; i < 3; i++)
{
cin >> num;
mul *= num;
}
k = to_string(mul);
for (int i = 0; i < k.size(); i++)
{
for (int j = 0; j < 10; j++)
{
if(k[i] == (char)'0'+j)
arr[j]+=1;
}
}
for (int t = 0; t < 10; t++)
{
cout << arr[t] << '\n';
}
}