Simple File Operations

1 # include <stdio. h> 2 3 int main () 4 {5 file * fp = fopen ("hello", "W +"); 6 if (FP = NULL) {7 perror ("fopen"); 8 return 1; 9} 10 11 char * P = NULL; 12 char * buff = "Hello boy! "; 13 14 int ret = fputs (buff, FP); // write the content to the file for 15 if (Ret <0) {16 perror (" fputs "); 17 return 1; 18} 19 20 fseek (FP, 0, seek_set); // point the file pointer to the header, because the value has already pointed to the last 21 22 unsigned char arr [1024] = {0}; // This array is used to store the 23 p = fgets (ARR, 1024, FP); 24 if (P = NULL) {25 perror ("fgets"); 26 return 1; 27} 28 printf ("% s \ n ", ARR); 29}

1. Fopen is a file that defines a file pointer.
2. Fputs writes strings to files.
3. Then, fgets is included in the file to the character array and output.

　　　　

Simple File Operations