A program that convert time from 12-hour system to 24-hour system.

TheLastTask.cpp

#include <iostream>
#include <string>

using namespace std;

void time_convert(string time);
int main()
{
    string str, time="";
    cout << "Please, Enter the time you want to convert: ";
    getline(cin ,str);
    for(int i=0 ; i<str.length() ; i++){
        if(str[i] == ':' || str[i] == ' '){
            continue ;
        }
        time += str[i];
    }
    cout << "The converted time is: ";
    time_convert(time);
    cout << " Hours.\n";
    return 0;
}

void time_convert(string time)
{
    if(time.length() == 6){
        if(time.substr(0 ,2) == "12"){
            if(time.substr(4) == "AM" || time.substr(4) == "am"){
                cout << "00" + time.substr(2 ,2);
            }
            else{
                cout << time.substr(0 ,4);
            }
        }
        else{
            if(time.substr(4) == "pm" || time.substr(4) == "PM"){
                cout << char(time[0] + 1) << char(time[1] + 2) << time.substr(2 ,2);
            }
            else{
                cout << time.substr(0 ,4);
            }
        }
    }
    else{
        if(time.substr(3) == "pm" || time.substr(3) == "PM"){
            cout << "1" << char(time[0] + 2) << time.substr(1 ,2);
            }
        else{
            cout << "0" << time.substr(0 ,3);
        }
    }
}