count digits all in main

t04e19.countdigits.cpp

// t04e19.countdigits.cpp
// juanfc 2026-03-25
//

#include <iostream>
using namespace std;

int main()
{
    int n;
    cin >> n;
    if (n < 0)
        n = -n;

    int count0 = 0, count1 = 0, count2 = 0, count3 = 0, count4 = 0,
        count5 = 0, count6 = 0, count7 = 0, count8 = 0, count9 = 0;

    if (n == 0) {
        count0 = 1;
    } else {
        while (n > 0) {
            switch (n % 10) {
                case 0: count0++; break;
                case 1: count1++; break;
                case 2: count2++; break;
                case 3: count3++; break;
                case 4: count4++; break;
                case 5: count5++; break;
                case 6: count6++; break;
                case 7: count7++; break;
                case 8: count8++; break;
                case 9: count9++; break;
            }
            n /= 10;
        }
    }
    if (count0 > 0) { cout << "0:" << count0 << "  "; }
    if (count1 > 0) { cout << "1:" << count1 << "  "; }
    if (count2 > 0) { cout << "2:" << count2 << "  "; }
    if (count3 > 0) { cout << "3:" << count3 << "  "; }
    if (count4 > 0) { cout << "4:" << count4 << "  "; }
    if (count5 > 0) { cout << "5:" << count5 << "  "; }
    if (count6 > 0) { cout << "6:" << count6 << "  "; }
    if (count7 > 0) { cout << "7:" << count7 << "  "; }
    if (count8 > 0) { cout << "8:" << count8 << "  "; }
    if (count9 > 0) { cout << "9:" << count9 << "  "; }
    cout << endl;
    return 0;
}