How To Save Output In Dev C++

When a program runs, the data is in the memory but when it ends or the computer shuts down, it gets lost. To keep data permanently, we need to write it in a file.

Thanks for A2A. First of all, I recommed you to use other compilers, better compilers. Other compilers already have this functionality. But if you want to use TC right now, I answer you assuming your TC.EXE is in the code C:TCBIN /codefolde. Programming with the Dev C IDE 1 Introduction to the IDE Dev-C is a full-featured Integrated Development Environment (IDE) for the C/C programming language. As similar IDEs, it offers to the programmer a simple and unified tool to edit, compile, link, and debug programs. It also provides support for the management of the. Oct 20, 2007  I have installed DEV C (version 4.9.9.2). I've seen that before too, where it gives me a warning but does still save the file. For Dev-Cpp it is highly recommended that you do not put your project in a path that contains spaces, or use spaces in your source filenames or output filename.

There is some easy to understand information here: Input/output with files You should ideally aim for a flexible system where you can store many different types of data (you could look into xml read/write libraries or boost serialisation). Dec 17, 2010  Thank you Browni, but i am a new c user and still need help:). Intro to File Input/Output in C. One way to get input into a program or to display output from a program is to use standard input and standard output, respectively. All that means is that to read in data, we use cin (or a few other functions) and to write out data, we use cout.

File is used to store data. In this topic, you will learn about reading data from a file and writing data to the file.

fstream is another C++ standard library like iostream and is used to read and write on files.

These are the data types used for file handling from the fstream library:

Data type	Description
ofstream	It is used to create files and write on files.
ifstream	It is used to read from files.
fstream	It can perform the function of both ofstream and ifstream which means it can create files, write on files, and read from files.

Opening a file

We need to tell the computer the purpose of opening our file. For e.g.- to write on the file, to read from the file, etc. These are the different modes in which we can open a file.

Mode	Description
ios::app	opens a text file for appending. (appending means to add text at the end).
ios::ate	opens a file for output and move the read/write control to the end of the file.
ios::in	opens a text file for reading.
ios::out	opens a text file for writing.
ios::trunc	truncates the content before opening a file, if file exists.

Let's look at the syntax of opening a file.

How To Print Output In Dev C++

We have opened the file 'example.txt' to write on it. 'example.txt' file must be created in your working directory. We can also open the file for both reading and writing purposes. Let's see how to do this:

Closing a file

C++ automatically close and release all the allocated memory. But a programmer should always close all the opened files. Let's see how to close it.

How To See Output In Dev C++

Reading and writing on a file

Save Dev Vs Save

We use << and >> to write and read from a file respectively. Let's see an example.

How To Get Output In Dev C++

Could someone tell me how to get the output of this program into a text file ?
#include <iostream>
#include <math.h>
using std::cout;
using std::cin;
using std::endl;
int main(void)
{
double x3, x2, x1, f;
double a, b, p;
double fa, fb, fp;
double tol;
int n, i;
char indicator = 'n';
int retry;
selection:
cout << endl
<< ' Enter the value of x^3 coeff :';
cin >> x3;
cout << endl
<< ' Enter the value of the X^2 coeff :';
cin >> x2;
cout << endl
<< ' Enter the value of x coeff :';
cin >> x1;
cout << endl
<< ' Enter the value of free coeff :';
cin >> f;
cout << endl
<< ' Insert the number of iterations :';
cin >> n;
cout << endl
<< ' Enter the wanted tolerance :';
cin >> tol;
cout << endl
<< ' Enter the value of a :';
cin >> a;
cout << endl
<< ' Enter the value of b :';
cin >> b;
p = (a+b)/2;
fa = x3 * pow(a,3) + x2 * pow(a,2) + x1 * a + f;
fb = x3 * pow(b,3) + x2 * pow(b,2) + x1 * b + f;
fp = x3 * pow(p,3) + x2 * pow(p,2) + x1 * p + f;
for (i = 1; i < n && tol < abs(fp) && a < b; i++)
{
p = (a+b)/2;
fa = x3 * pow(a,3) + x2 * pow(a,2) + x1 * a + f;
fb = x3 * pow(b,3) + x2 * pow(b,2) + x1 * b + f;
fp = x3 * pow(p,3) + x2 * pow(p,2) + x1 * p + f;
cout << endl
<< 'Iteration number ' << i;
cout <<endl
<< '~~~~~~~~~~~~~~~~~~~';
cout <<endl
<< 'a = ' <<a;
cout <<endl
<< 'b = ' <<b;
cout <<endl
<< 'p = ' <<p;
cout <<endl
<< ' ';
cout <<endl
<< 'f(a) = ' <<fa;
cout <<endl
<< 'f(b) = ' <<fb;
cout <<endl
<< 'f(p) = ' <<fp;
cout <<endl
<< ' ';
cout << endl
<< 'Solution = ' <<p;
cout << endl
<<'______________________';
if ((fa < 0) && (fp < 0))
a = p, b = b;
else
a = a, b = p;
}
cout<<endl
<<'Select the number of the desired option.n';
cout<<'1. Try another problemn';
cout<<'2. Exit the programn';
cout<<'>>. ';
cin>>retry;
switch (retry) {
case 1:
goto selection;
case 2:
goto exit;
}
exit:
return 0;
}