(C) File input/output

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;
}

Questions

• What are the options on opening a file I want to read from?
• What are the options on opening a file I want to write to ?
•  ?How can I check if a file exists?
•  ?How do I copy a file?
•  ?How do I get a file's path?
•  ?How do I get a filename's extension?
•  ?How do I remove a filename's extension?

'File I/O' links

• C++
• Prolog

Code links

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