(C) fopen

Example

include <stdio.h>

include <assert.h>


int main(void)
{
  FILE * pFile = 0;
  char myText[100];
  /* Open the file myFile.txt for writing */
  pFile = fopen ("myFile.txt","w");
  
  /* Assume file has been opened succesfully */
  assert(pFile != 0);
  
  /* Prompt for input */ 
  puts("please type some text:");
  
  /* Get the input in the character buffer 'myText'*/
  gets(myText);
  
  /* Write character buffer 'myText' to file */
  fprintf (pFile, "Your text: %s\n",myText);
   
  /* Close the file */
  fclose (pFile);
  
  return 0;
}

+----+------------------------------------------------------+
| r  | open for reading                                     |
| w  | open for writing (file need not exist)               |
| a  | open for appending (file need not exist)             |
| r+ | open for reading and writing, start at beginning     |
| w+ | open for reading and writing (overwrite file)        |
| a+ | open for reading and writing (append if file exists) |
+----+------------------------------------------------------+

'fopen' links

• C++

Code links

• assert
• char
•  ?FILE
• fopen
• fclose
• fprintf
•  ?gets
• int
• main
•  ?puts
• return
• void