Converting string from a txt file to int?

[heraldo]

How will I add the existing content of the text file to the newly inputed date(hoursworked & minsWorked) to compute the total number of hours works please help me I'm just a beginner in using Visual basic C++. I dont know wht to do please help me guys.

I hope you can help me please this is in rush

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

bool parseTime(char* _timeStr, int& _hour, int& _min)
{
// Make sure a pointer was passed in
if (NULL == _timeStr)
return false;

// Hours starts at the string passed in, minutes we figure out in a second
char* hourStr = _timeStr;
char* minStr = NULL;

// Loop through the string looking for the : character
char* curChar = _timeStr;
while (*curChar)
{
if (':' == *curChar)
{
// Found our minutes string. NULL terminate the hour string and set the minute string.
*curChar = '\0';
minStr = curChar + 1;
break;
}

++curChar;
}

// If no minute string was found, error
if (NULL == minStr)
return false;

// Convert the strings to integers and store them
_hour = atoi(hourStr);
_min = atoi(minStr);

// Restore the : character (could also use the "curChar" variable for this, but this way is more fun)
*(minStr - 1) = ':';

// Test for invalid values
if (_hour < 0 || _hour > 23)
return false;
if (_min < 0 || _min > 59)
return false;

// Theoretical success!
return true;
}

int main ()
{
char time1[80];
char time2[80];

std::ofstream outfile;
string line;
string name;
int totaltimeused;
ofstream myfile;
myfile<<totaltimeused;
myfile.close();
cout<<"Enter your name :";
cin>>name;
if(name=="a")
{

ifstream myfiles ("herald.txt");
if (myfiles.is_open())
{
while ( getline (myfiles,line) )
{
cout << line << '\n';
}
myfiles.close();
}else{
cout << "Unable to open file"; }

cout<<"Time in: ";
cin >> time1;
cout<<"Time out: ";
cin >> time2;

int hour1, min1;
int hour2, min2;

if (!parseTime(time1, hour1, min1))
{
cout << "Error parsing time 1: " << time1 << ". Invalid time format.\n";
return(0);
}

if (!parseTime(time2, hour2, min2))
{
cout << "Error parsing time 2: " << time2 << ". Invalid time format.\n";
return(0);
}

// Hours worked and minutes worked
int hoursWorked = hour2 - hour1;
int minsWorked = min2 - min1;


// It is possible that a full hour was not worked, meaning the minutes would be negative.
if (minsWorked < 0)
{
// If that is the case, deduct one hour and add 60 minutes. Since minutes is negative, this
// yields the actual minutes worked (IE, -4 becomes 56).
--hoursWorked;
minsWorked += 60;
}


cout << "Time worked: " << hoursWorked << " hours, " << minsWorked << " minutes.\n";


myfile.open ("herald.txt",std::ios_base::in);
myfile<< hoursWorked<< "hours,"<< minsWorked <<"minutes.\n";
myfile.close();

return 0;
}
}

[dub1987]

For starters, to make your code easier to read use the <> button on the right of your text box under format. Your code will look more like

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

I will take a look at your code real quick to see if I can be of any help, but here is my disclaimer, I am not, nor have I ever been, a licensed programmer. I am only a beginner but I will do my best.

[dub1987]

First off, I do not see where you are initially opening your file. But, if I am understanding your question correctly, I believe you are looking for ios::app so for example: myfiles.open("herald.txt", ios::app); this will allow you to add information to an existing file.

[heraldo]

sir with this I open my .txt

ifstream myfiles ("herald.txt");
if (myfiles.is_open())
{
while ( getline (myfiles,line) )
{
cout << line << '\n';
}
myfiles.close();
}else{
cout << "Unable to open file"; }

[heraldo]

sir dub1987 can you help me please to create a simple program that computes
time like a Daily Time Record that will save the records to a text file.
May be like this format:
example.

Enter your name: GERALD
Date Morning Afternoon
In Out In Out
1 8:00 AM 12:00 AM 8:00PM 5:00PM
total:4:00 total:4:00
total per day:8:00hours

and it will be save to a .txt file and once the program will be run again it will
remember the total hours per day and will ask again the user to input for the other day.

[heraldo]

look sir at this program

#include <stdio.h>
#include "conio.h"
#include <iostream>
#include <windows.h>
#include<string>
using namespace std;
HANDLE console = GetStdHandle(STD_OUTPUT_HANDLE);
COORD CursorPosition;
void gotoXY(int x, int y);
int choice;
float in,out,totalhours,inmin,outmin,totalmin,converter=60,temp1;
float in2,out2,totalhours2,inmin2,outmin2,totalmin2,converter2=60,temp2,daytotalhours,daytotalminutes; 
	void add()
	{
		
	gotoXY(30,1);cout<<"DAILY TIME RECORD";
	gotoXY(20,2);cout<<"MORNING"; gotoXY(50,2);cout<<"AFTERNOON"; 
	gotoXY(12,4);cout<<"Time-in"; gotoXY(28,4);cout<<"Time-out";
	gotoXY(42,4);cout<<"Time-in"; gotoXY(60,4);cout<<"Time-out";
	gotoXY(13,5);cin>>in; gotoXY(14,5);cout<<":"; gotoXY(15,5);cin>>inmin;
	gotoXY(29,5);cin>>out; gotoXY(31,5);cout<<":"; gotoXY(32,5);cin>>outmin;

		if(outmin<inmin)
	{
		temp1=inmin-outmin;
		converter-=temp1;
		totalhours=out-in;
		totalhours-=1;
     gotoXY(19,7);cout<<"Hours used";
	gotoXY(21,8);cout<<totalhours; gotoXY(22,8); cout<<":"; cout<<converter; 
	}
	else
	{
	totalhours=out-in;
	totalmin=outmin-inmin;

	if(totalmin>0&&totalmin<10)
	{
     gotoXY(19,7);cout<<"Hours used";
	gotoXY(22,8);cout<<totalhours;gotoXY(23,8); cout<<":";	gotoXY(24,8);cout<<"0"; ; cout<<totalmin; 
	}
	else
	{
		 gotoXY(19,7);cout<<"Hours used";
	gotoXY(22,8);cout<<totalhours; gotoXY(23,8); cout<<":"; cout<<totalmin; 
	}	
	}
	
	//afternoon
	gotoXY(43,5);cin>>in2; gotoXY(45,5);cout<<":"; gotoXY(46,5);cin>>inmin2;
	gotoXY(61,5);cin>>out2; gotoXY(63,5);cout<<":"; gotoXY(64,5);cin>>outmin2;

		if(outmin2<inmin2)
	{
		temp2=inmin2-outmin2;
		converter2-=temp2;
		totalhours2=out2-in2;
		totalhours2-=1;
     gotoXY(50,7);cout<<"Hours used";
	gotoXY(53,8);cout<<totalhours2; gotoXY(54,8); cout<<":"; cout<<converter2; 
	}
	else
	{
	totalhours2=out2-in2;
	totalmin2=outmin2-inmin2;
	
	if(totalmin2>0&&totalmin2<10)
	{
	gotoXY(50,7);cout<<"Hours used";
	gotoXY(53,8);cout<<totalhours2; gotoXY(54,8); cout<<":";	gotoXY(55,8);cout<<"0"; ; cout<<totalmin2; 
	}
	else
	{
	gotoXY(50,7);cout<<"Hours used";
	gotoXY(53,8);cout<<totalhours2; gotoXY(54,8); cout<<":"; cout<<totalmin2; 
	}	
	}
	daytotalhours=totalhours+totalhours2;
	daytotalminutes=totalmin+totalmin2;
	gotoXY(31,9);cout<<"Total Hours Used";
	gotoXY(37,10);cout<<daytotalhours<<":00";
	
	}
int main()
{
	gotoXY(33,2);cout<<"-----MENU-----";
	gotoXY(33,4);cout<<"(1) Add Record";
	gotoXY(33,5);cout<<"(2) View";
	gotoXY(33,6);cout<<"(3) Delete";
	gotoXY(33,7);cout<<"(4) Quit";
	gotoXY(33,8);cout<<"Choice:";cin>>choice;
	if(choice==1)
	{
		system("cls");
		add();
	}
	
	
	
return 0;
	
}

void gotoXY(int x, int y) 
{ 
CursorPosition.X = x; // Locates column
CursorPosition.Y = y; // Locates Row
SetConsoleCursorPosition(console,CursorPosition); // Sets position for next thing to be printed 
}

[dub1987]

Are you trying to keep a running total of the hours or are you trying to make it more of a list format?