C/stdio.h/fopen
Версия от 14:20, 25 мая 2010; (обсуждение)
fopen: opens a file by *fname
//Header: #include <stdio.h>
//Declaration: FILE *fopen(const char *fname, const char *mode);
//Return: returns a FILE pointer on success or NULL pointer on failure
//The legal values for mode.
//Mode Meaning
//"r": Open text file for reading
//"w": Create a text file for writing
//"a": Append to text file
//"rb": Open binary file for reading
//"wb": Create binary file for writing
//"ab": Append to a binary file
//"r+": Open text file for read/write
//"w+": Create text file for read/write
//"a+": Open text file for read/write
//"rb+" or "r+b": Open binary file for read/write
//"wb+" or "w+b": Create binary file for read/write
//"ab+" or "a+b": Open binary file for read/write
#include <stdio.h>
#include <stdlib.h>
int main(int argc, char *argv[])
{
FILE *fp;
if ((fp = fopen("test", "w"))==NULL) {
printf("Cannot open file.\n");
exit(1);
}
fclose(fp);
}
Open a file called TEST for binary read/write operations
#include <stdio.h>
#include <stdlib.h>
int main(int argc, char *argv[])
{
FILE *fp;
if((fp=fopen("test", "rb+"))==NULL) {
printf("Cannot open file.\n");
exit(1);
}
fclose(fp);
}