missing file header

[sackmac]

Anybody,.. i was coding a program based a tutorial and than, i didn't find a file header in include dir, for example <stdafx.h>, because error message told me about that. Can i find it by download and put that h file in include dir? Thanks.

[S6k9GNh0]

stdafx.h is generally a precompiled header used in VC++. You can probably just removed that include directive.

[Stewbond]

It's a pre-compiled header. If you've created your project, then you probably don't need this if you don't know what it is. To get rid of this error:

1. Remove references to <stdafx.h> in your source files.
2. Right click on your project in the Solution Explorer.
3. Choose 'Properties'
4. In the property window, select Configuration Properties > C/C++ > Precompiled headers.
5. In the "Precompiled Header" field, select "Not using precompiled headers"

[sackmac]

computerquip..
I did, but i got 1 error message. This my code before removed stdafx.h, I'm using wxDev-C++

#include "stdafx.h"
#include <stdio.h>
#include <tchar.h>
#include <iostream>
#include <math.h>
#include <conio.h>
#include <iomanip>
#include <time.h>
#include <stdlib.h>
#include <dos.h>
// We need to output stuff, and we need the sine function

using namespace std;

 int sinewave()
{
    srand((unsigned)time(0));
    // declarations
    FILE *fptr;
    char fileName[50] = "";
    double freq;
    double gain;
    double phase;
    double bias;
    double noise;
    char save;
    const long double PI = acos((long double) -1);

    // user inputs for sine wave values

    cout<<"Enter Frequency: [1-10Mhz] ";
        cin>>freq;
    cout<<"Enter Gain of Sine Wave: [1-10] ";
        cin>>gain;
    cout<<"Enter Phase Angle: [0-180] ";
        cin>>phase;
    cout<<"Enter Bias (offset) [+/- 10] ";
        cin>>bias;
    cout<<"Enter % Noise level introduced to sine (percent) [0 - 100%] ";
        cin>>noise;
    cout<<"Do you want to save the data [y/n]: ";
        cin>>save;

    if (save == 'y')
       {
        cout<<"Enter a file name you wish to use: ";
            cin>> fileName;
       }

    double timeint = (double)1/freq/360;
    long double interval = (2*PI)/360;
    long double sinevalue;
    if (save = 'y')
       {
        sprintf(fileName, "%s.csv", fileName);
        fptr = fopen(fileName, "w");
        fprintf(fptr, "%s,", "Time(1/f)");
        fprintf(fptr, "%s\n", "Sine Pattern");
       }
    for(int i=0; i<=360; i++)
      {
        sinevalue = (gain*sin((interval*i)+phase)+(rand()*(noise/100)*gain))+bias;
        if (save = 'y')
         {
            fprintf(fptr, "%f,", timeint*i);
            fprintf(fptr, "%f\n", sinevalue);
         }
      }

    system("PAUSE");
    return EXIT_SUCCESS;
}

[S G H]

Mind about posting your error message at least?
We could solve your problem 10 times faster, if you tell us what's the error message. Anyways, if it's about "Missing precompiled header" or similar, you have to turn off the precompiled header option in your project settings.
EDIT: Just noticed, there is no entry point. Declare your "int main()" function.
RE-EDIT: You just needed three includes: <cstdio>, <cmath> and <iostream>.
RE-RE-EDIT: Change your "system("pause")" into "cin.get()".

[sackmac]

Stewbond..
i didn't find like what you mean. I didn't find Solution Explorer. But, i got properties, in properties i didn't find Precompiled Header.

[S G H]

Did you try to remove the ' #include "stdafx.h" ' line at least?
You cannot find "Precompiled header" in project options because you are using wxDev-C++ (So also ignore that part on my post)

[sackmac]

EssGeEich..
i was removed #include "stdafx.h" and the error message that is,
[Linker error] undefined reference to 'WinMain@16'
ld returned 1 exit status.
[Build error][Output/MingW/grap.exe] Error 1

[S G H]

It's nothing related to stdafx. You have to declare your main function. Where is your program supposed to start? It has no start. Did you notice? It simply asks you to create a starting point.

[sackmac]

EssGeEich..
So, what must i do?

[S G H]

You didn't answer my question. Where is your program supposed to start at?

[sackmac]

line 15th

[Stewbond]

Replace line 15 with int main()

[sackmac]

Thanks Stewbond..
But, they working only until line 42nd

[Stewbond]

if you type anything other than lower-case y, filename will be uninitialized for the printing. I bet that is your problem.

[sackmac]

Thanks again Stewbond..