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Tutorials
Cpp
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Topic |
How is "fopen()" used in C++?
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Explanation |
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fopen() is an I/O function that used to open a file pointed by the function to return the stream associated with it.
Syntax:
FILE *fopen( const char *fname, const char *mode);
In the above syntax the "mode" specifies the different modes used to open the file. Following table
lists the different modes.
| Mode |
Description |
| r |
Open the text file for reading. |
| w |
Create a text file for writing. |
| a |
Append to text file |
| rb |
Open a binary file for reading |
| wb |
create a bnary file for writing |
| ab |
Append to a binary file |
| r+ |
Open a text file for read/write |
| w+ |
Create a text filefor read/write. |
| a+ |
Open a text file for read/write. |
| rb+ or r+b |
Open a binary file for read/write. |
| wb+ or w+b |
Create a binary file for read/write. |
| ab+ or a+b |
Open a binary file for read/write. |
Example:
#include <stdio.h>
int main ()
{
FILE * str = fopen ("fopeneg.txt","w");
fputs ("Used fopen function", str);
fclose (str);
return 0;
}
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Result:fopeneg.txt
Used fopen function
In the above example the function is used to open the file in the write mode. Then
the "fputs()" is used to write the text to the file.
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| Note |
C++ is one of the most used programming languages in the world. Also known as "C with Classes".
Hope you enjoy this tutorial. Do send your feedback or suggestions on this C++ tutorial. This is a copyright content.
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