C++ program won't compile

English Programming/Scripting
#1

I am trying to debug a problem with one of my assignment for my Intro
to C++ Programming which reads a list of time from a file, in seconds,
then convert them to minutes and seconds along with printing out the
total run time of the CD

the code that I have is

,---- CODE ]
| /Adam Jimerson
|10/09/09
|Songs
|/
|
|#include <iostream> //Needed for input and output stream
|#include <fstream> //Needed for ifstream
|#include <iomanip> //Needed for setprecision
|#include <string> //Needed for string manipulation
|
|using namespace std;
|
|ifstream inFile; //Create the file handle for the file to be read
|
||int main()
|{
| inFile.open ( “songs.dat” ); //Open the file to be
read
| if ( ! inFile ) { //Test to see if songs.dat can be
read
| inFile.close();
| cerr << “Can’t open songs.dat.” << endl; //If not
print an error stating such
| cout << "Where is songs.dat? " << endl;
//Poll user asking for its location
| string songdata;
| cin >> songdata; //Read in and store the location
| inFile.open ( songdata ); //Open the file to be
read
| }
| int SongTime; //Get the song play time from songs.dat
| int SongNumber = 1; //Count the Song Number from the
list
| int TotalSongTime;
| //int ConvertSongTime; //Use this if needed to convert time
from seconds only to minutes

| cout << “Song Song Time
Total Time” << endl;
| cout << “Number Minutes Seconds
Minutes Seconds” << endl;
| cout << “------- ------- -------
------- -------” << endl;

| while ( inFile >> SongTime ) {
| TotalSongTime = TotalSongTime + SongTime;
| SongTime = SongTime / 60;
| cout << SongNumber << " " <<
setprecision ( 2 ) << SongTime << " " <<
setprecision ( 2 ) << TotalSongTime << endl;
| SongNumber ++;
| }
| return 0;
|}
`----

The songs.dat file is
,---- ]
| 325
|145
|120
|280
|400
|315
|580
|560
|890
|169
|232
|351
|116
|96
`----

The error that I get is on Line 26 about "No matching function for
call to ‘std::basic_ifstream<char, std::char_traits<char>
>::open(std::string&)’

“We must plan for freedom, and not only for security, if for no other
reason than only freedom can make security more secure.” Karl Popper

#2

Ok so I changed my approach and it compiles now, but my problem is with my output, sense I am dealing with time in this program I can’t have anything greater than 60 seconds. Also I have no clue with is up with the third column in my output.

/*Adam Jimerson
10/09/09
Songs
*/

#include <iostream>	//Needed for input and output stream
#include <fstream>	//Needed for ifstream
#include <iomanip>	//Needed for setprecision
#include <cstdlib>	//Needed for Exit

using namespace std;

ifstream inFile; //Create the file handle for the file to be read



int main()
{
	inFile.open ( "songs.dat" );	//Open the file to be read
        if ( ! inFile ) {	//Test to see if songs.dat can be read
		inFile.close();
                cerr << "Can't open songs.dat." << endl;	//If not print an error stating such
		exit(1);
        }
        float SongTime;	//Get the song play time from songs.dat
        int SongNumber = 1;	//Count the Song Number from the list
        float TotalSongTime;

        cout << "Song		Song Time		Total Time" << endl;
        cout << "Number		Minutes Seconds		Minutes Seconds" << endl;
        cout << "-------		------- -------		------- -------" << endl;

        while ( inFile >> SongTime ) {
                TotalSongTime = TotalSongTime + SongTime;
                SongTime = SongTime / 60;
                cout << SongNumber << "		" << setprecision(3) << SongTime << "			" << setprecision(3) << TotalSongTime << endl;
                SongNumber ++;
        }
	inFile.close();
        return 0;
}

The output I get with the above is:

Song            Song Time               Total Time     
Number          Minutes Seconds         Minutes Seconds
-------         ------- -------         ------- -------
1               5.42                    325            
2               2.42                    470
3               2                       590
4               4.67                    870
5               6.67                    1.27e+03
6               5.25                    1.58e+03
7               9.67                    2.16e+03
8               9.33                    2.72e+03
9               14.8                    3.62e+03
10              2.82                    3.78e+03
11              3.87                    4.02e+03
12              5.85                    4.37e+03
13              1.93                    4.48e+03
14              1.6                     4.58e+03
#3

This is going to give you minutes, plus the remainder as a fraction. (Which is what the output is showing.) You should do something like


SongTimeMinutes = SongTime / 60;
SongTimeSeconds = SongTime - (SongTimeMinutes*60);

… and print them separately. As for the third column,

<< setprecision(3)

It’s doing exactly what you told it to: it has set the precision to a fixed 3 places. Once you go past 999 total time, it starts displaying as an exponent.

Can’t help you much more beyond that. College classes want you to use the “cout” and “infile” stuff, but I’ve never used them in real life. (I’ve never met a C++ programmer who uses them in the real world, either, though I know there has to be at least a few.) They’re too clunky and error prone, and I want better control of the I/O. Even in my most advanced C++ programs, I use fopen(), fread(), fwrite(), and (of course!) good ol’ printf() for output. More control, I can get exactly what I want, and no surprises. But that’s just my opinion.

#4

I remember that if you want to omit the special notation 1.Ex

you need to pass an argument earlier, something like:

cout.setf(ios_base::fixed);

So it would look like this:

/*Adam Jimerson
10/09/09
Songs
*/

#include <iostream> //Needed for input and output stream
#include <fstream> //Needed for ifstream
#include <iomanip> //Needed for setprecision
#include <cstdlib> //Needed for Exit

using namespace std;

ifstream inFile; //Create the file handle for the file to be read

int main()
{
cout.setf(ios_base::fixed);

    inFile.open ( "songs.dat" );	//Open the file to be read
    if ( ! inFile ) {	//Test to see if songs.dat can be read
	inFile.close();
            cerr &lt;&lt; "Can't open songs.dat." &lt;&lt; endl;	//If not print an error stating such
	exit(1);
    }
    float SongTime;	//Get the song play time from songs.dat
    int SongNumber = 1;	//Count the Song Number from the list
    float TotalSongTime;

    cout &lt;&lt; "Song		Song Time		Total Time" &lt;&lt; endl;
    cout &lt;&lt; "Number		Minutes Seconds		Minutes Seconds" &lt;&lt; endl;
    cout &lt;&lt; "-------		------- -------		------- -------" &lt;&lt; endl;

    while ( inFile &gt;&gt; SongTime ) {
            TotalSongTime = TotalSongTime + SongTime;
            SongTime = SongTime / 60;
            cout &lt;&lt; SongNumber &lt;&lt; "		" &lt;&lt; setprecision(3) &lt;&lt; SongTime &lt;&lt; "			" &lt;&lt; setprecision(3) &lt;&lt; TotalSongTime &lt;&lt; endl;
            SongNumber ++;
    }
inFile.close();
    return 0;

}

#5

I meant to post this the other night but I managed to get this to work correctly

Here is my working code:

/*Adam Jimerson
10/09/09
Songs
*/

#include <iostream>	//Needed for input and output stream
#include <fstream>	//Needed for ifstream
#include <cstdlib>	//Needed for Exit

using namespace std;

ifstream inFile; //Create the file handle for the file to be read



int main()
{
	inFile.open ( "songs.dat" );	//Open the file to be read
        if ( ! inFile ) {	//Test to see if songs.dat can be read
		inFile.close();
                cerr << "Can't open songs.dat, does the files exist?" << endl;	//If not print an error stating such
		exit(1);
        }
        int SongTime;	//Get the song play time from songs.dat
        int SongNumber = 1;	//Count the Song Number from the list
        int TotalSongTime;	//Use for calculating the total CD run time
	int seconds;	//Use to calculate the number of seconds for each track
	int minutes;	//Use to calculate the number of minutes for each track
	int Totalseconds;	//Use to calculate the number of seconds for the whole CD
	int Totalminutes;	//Use to calculate the number of minutes for the whole CD
	int FreeMinutes;	//Use to calculate the number of minutes remaining on the CD
	int FreeSeconds;	//Use to calculate the number of seconds remaining on the CD

        cout << "Song		Song Time		Total Time" << endl;
        cout << "Number		Minutes Seconds		Minutes Seconds" << endl;
        cout << "-------		------- -------		------- -------" << endl;	//Print out the layout

        while ( inFile >> SongTime ) {
                TotalSongTime = TotalSongTime + SongTime;	//Calculate the total CD run time
		seconds = SongTime % 60;	//Calculate the number of seconds in the track
		minutes = SongTime / 60;
		minutes = minutes % 60;	//Calculate the number of minutes in the track
                Totalseconds = TotalSongTime % 60;	//Calculate the number of seconds for the whole CD
		Totalminutes = TotalSongTime / 60;	//Calculate the number of minutes for the whole CD
		cout << SongNumber << "		" << minutes << ":" << seconds << "			" << Totalminutes << ":" << Totalseconds << endl;	/*Display the 
		information to the user, following the layout set above*/
                SongNumber ++; //Incrament the song count
        }
	FreeMinutes = 80 - Totalminutes;	//Find the number of minutes left on the CD
	FreeSeconds = 60 - Totalseconds;	//Find the number of seconds left on the CD
	cout << "There are " << FreeMinutes << " minutes and  " << FreeSeconds << " seconds left on the 80-minutes CD." << endl; //Display the information to the user
	inFile.close();	//Close the songs.dat file
        return 0;
}

This is the output now:

Song            Song Time               Total Time
Number          Minutes Seconds         Minutes Seconds
-------         ------- -------         ------- -------
1               5:25                    5:25           
2               2:25                    7:50           
3               2:0                     9:50
4               4:40                    14:30
5               6:40                    21:10
6               5:15                    26:25
7               9:40                    36:5
8               9:20                    45:25
9               14:50                   60:15
10              2:49                    63:4
11              3:52                    66:56
12              5:51                    72:47
13              1:56                    74:43
14              1:36                    76:19
There are 4 minutes and  41 seconds left on the 80-minutes CD.

Might not be the best way to do it, but it works and my teacher is already going to count off for me going the extra step and testing to see if the input file was opened or not :stuck_out_tongue:

#6

He’s going to count off for error checking? :open_mouth:
Tell him he gets 5 point off from me;)

Dave

#7

He doesn’t like students doing more than what the assignment asks for, he took points off because I used a function in one of my assignments before we had covered them. At this point I don’t care if he takes points off or not I’m doing this to learn and if he doesn’t like me to learn how to program in C++ he can fail me :stuck_out_tongue: