PAT1021.个位数统计

#include <iostream>using namespace std;int main(){char num[1000];cin >> num;int i = 0;int count[10] = {};while (num[i] != '\0'){int c = num[i++] -'0';++count[c];}for(int i=0;i<10;++i){if(count[i] != 0)cout<<i<<":"<<count[i]<<endl;}return 0;}