"Standard io" of Pleasant Goat Series

Blog Address: Http://blog.csdn.net/muyang_ren

1. copy files by character

/*************************************************************************> File name:1_size.c> Author: 梁惠 Chung > Addr: > Created time:2015 April 12 Sunday 22:24 52 seconds ************************************************************** /#include <stdio.h> #include <stdlib.h>int main () {    char ch;    FILE *FP1,*FP2;        FP1 = fopen ("1_size.c", "R");    if (FP1 ==null) {        perror ("fopen:");        Exit ( -1);    }    FP2 = fopen ("1.txt", "w");    if (FP2 ==null) {        perror ("fopen:");        Exit ( -1);    }    while ((Ch=getc (FP1))! = EOF) {        putc (CH,FP2);        PUTC (ch,stdout);    }    Fclose (FP1);    Fclose (FP2);    return 0;}

2. copy files by row

/*************************************************************************> File name:2_line.c> Author: 梁惠 Chung > Addr: > Created time:2015 April 12 Sunday 22:38 22 seconds ************************************************************** /#include <stdio.h> #include <stdlib.h> #define size 40int main () {    char str[size];    FILE *FP1,*FP2;        FP1 = fopen ("2_line.c", "R");    if (FP1 ==null) {        perror ("fopen:");        Exit ( -1);    }    FP2 = fopen ("2.txt", "w");    if (FP2 ==null) {        perror ("fopen:");        Exit ( -1);    }    while (fgets (STR,SIZE,FP1) = NULL) {        fputs (STR,FP2);        Fputs (str,stdout);    }    Fclose (FP1);    Fclose (FP2);    return 0;}

3. File "Direct io" copy

/*************************************************************************> File name:3_direct.c> Author: Liang > Addr: > Created time:2015 April 12 Sunday 22:47 08 Sec. *********************************************************** /#include <stdio.h> #include <stdlib.h> #include <strings.h> #include <string.h>    #define SIZE 100int Main () {char str[size];    FILE *FP1,*FP2;        int flend_num;    FP1 = fopen ("3_direct.c", "R");        if (FP1 ==null) {perror ("fopen:");    Exit (-1);    } FP2 = fopen ("3.txt", "w");        if (FP2 ==null) {perror ("fopen:");    Exit (-1);  } fseek (Fp1,0,seek_end); Locate the file pointer to the end of the file Flend_num = Ftell (FP1);  Flend_num Store file Total characters fseek (fp1,0,seek_set);        Locate the file pointer to the beginning of the file while (Ftell (FP1) < Flend_num) {bzero (str,size);   Fread (str,sizeof (str), 1,FP1);  To read the file, use sizeof to write full cache space fwrite (Str,strlen (str), 1,FP2);    Writes a file using strlen, writes valid characters in the cache to the file fwrite (Str,strlen (str), 1,stdout);  }  Fclose (FP1);    Fclose (FP2); return 0;}

4, file character reverse copy

/*************************************************************************> File name:4_reverse.c> Author: Liang > Addr: > Created time:2015 April 16 Thursday 18:44 55 sec. ***********************************************************    /#include <stdio.h> #include <string.h> #include <stdlib.h> #define size 100int main () {    FILE *FP1,*FP2;    int File_len;        Char str[size], ch;    printf ("Please enter string:");    scanf ("%s", str); FP1 = fopen ("4_1.txt", "w+r");   Positive sequence File FP2 = fopen ("4_2.txt", "w");  Reverse File fwrite (Str,strlen (str), 1,FP1);        The input string is stored in 4_1.txt fseek (FP1, 0, seek_end);    Locate the file pointer to the end of the file File_len = Ftell (FP1);          for (; file_len>0; file_len--) {fseek (FP1, file_len-1, Seek_set);          CH=FGETC (FP1);        Get a character from this address FPUTC (CH, FP2);    FPUTC (CH, stdout);        } putc (' \ n ', stdout);    Fclose (FP1);    Fclose (FP2); return 0;}

"Standard io" of Pleasant Goat Series