UVa - 483 - Word Scramble

#include <iostream>
#include <string>
using namespace std;

int main(){
    string primary_words, rev_words;
    int cnt;
    while(getline(cin, primary_words)){
        int l = primary_words.size();cnt = 0;
        for(int i = 0; i < l; i++){
            cnt++;
            if(primary_words[i] == ' '){
                int m = 0;
                for(int k = cnt-2; k >= 0; k--){
                    rev_words.push_back(primary_words[i-1]);i--;m++;
                }i += m;
                rev_words.push_back(' ');cnt = 0;
            }
            if(i == l-1){
                int m = 0;
                for(int k = cnt-1; k >= 0; k--){
                    rev_words.push_back(primary_words[i]);i--;m++;
                }i += m;
            }
        }
        cout << rev_words << endl;
        rev_words.clear();
    }
    return 0;
}