Ishan_Time_conversion.cpp

Ishan_Time_conversion.cpp

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+#include <iostream>
+#include <string>
+#include <cstdlib>
+#include <bits/stdc++.h>
+using namespace std;
+
+
+int display_Choices();
+string twentyfour_to_twelve();
+string twelve_to_twentyfour();
+string get_input();
+void display(string);
+int main(){
+string (*funptr[])()={twentyfour_to_twelve,twelve_to_twentyfour};
+display((funptr[display_Choices()])());
+
+return 0;
+}
+/***
+
+
+Display the choices and input format
+
+
+***/
+int display_Choices(){
+int a;
+cout << "Enter the requiered option:\n";
+cout << "24 hour to 12 hour format [input format: 23:00   12:12   12:00  0:00] -> press 1\n";
+cout << "12 hour to 24 hour format [input format: 12:00NOON  2:10PM   1:00PM  0:00MIDNIGHT] -> press 2\n";
+
+cin >> a;
+return a-1;
+}
+
+/***
+
+
+
+Recieve the input from the uder
+
+
+***/
+
+
+
+string get_input(){
+string time;
+cout << "Enter the time of decided format:\n";
+cin >> time; 
+return time;
+}
+
+/***
+
+
+
+Function to convert 24hr to 12hr format
+
+
+
+***/
+
+string twentyfour_to_twelve(){
+string result;
+string time = get_input();
+int index = time.find(':');
+int hours = strtol(time.substr(0,index).c_str(),NULL,10);
+int minutes = strtol(time.substr(index+1,time.length()-index-1).c_str(),NULL,10);
+int hour12 = (hours!=12)?hours%12 : hours ;
+string amorpm;
+if (hours!=12 && minutes!=0)
+amorpm= hours>=12?"PM":"AM";
+ else if (hours==0 && minutes==0){
+ amorpm="MIDNIGHT";
+ }
+ else{
+ amorpm="NOON";
+ }
+ result=to_string(hour12)+":"+(minutes<10?"0"+to_string(minutes):to_string(minutes))+amorpm;
+ return result;
+}
+/***
+
+
+function to convert the 12hr to 24hr format
+
+
+
+***/
+
+
+
+string twelve_to_twentyfour(){
+int hours24;
+int minutes;
+string amorpm;
+string result;
+string time=get_input();
+int index=time.find(':');
+int hours = strtol(time.substr(0,index).c_str(),NULL,10);
+reverse(time.begin(),time.end());
+string rev=time;
+if(rev.substr(0,2)!="MP" && rev.substr(0,2)!="MA")
+{ reverse(time.begin(),time.end());
+ minutes = strtol(time.substr(index+1,time.length()-index-1-3).c_str(),NULL,10);}
+else{
+reverse(time.begin(),time.end());
+minutes = strtol(time.substr(index+1,time.length()-index-1-2).c_str(),NULL,10);
+}
+if(rev.substr(0,2)=="MP")
+ hours24=12+hours;
+else if(rev.substr(0,2)=="TH"){
+hours24=0;
+}
+else {
+hours24=hours;
+}
+
+
+result=to_string(hours24)+":"+(minutes<10?"0"+to_string(minutes):to_string(minutes));
+return result;
+}
+
+/***
+
+
+display the result
+
+
+***/
+
+void display(string result){
+cout << result;
+}