The next day-------Fgetc,fputc,fgets,gputs,fread,fwrite

int getchar (void);

The GetChar function is equivalent to GETC (stdin). Read one character from standard input

int getc (FILE *stream);

Return value: The return value is usigned char but we treat it with the int type

is typically defined as a macro to use

int fgetc (FILE *stream);

Is the same as the GETC function, but is generally defined as function usage

Macros and Functions:

Macro does not occupy the scheduling time, only takes up the compilation time;

The function occupies the scheduling time, does not occupy the compile time;

 is equivalent to PUTC (c, stdout).

Output point to standard output

int FPUTC (int c, FILE *stream);

Output to the specified stream file

Example 1: File copy

/*./mycpy src dest*//*function, using FPUTC fgetc to implement file copy function*//*argv[1]:src argv[2]:d est*/#include<stdio.h>#include<stdlib.h>intMainintARGC,Char**argv) {FILE*fps; FILE*FPD; intch; if(ARGC <3) {fprintf (stderr,"usage:%s <src.file> <dest.file>\n", argv[0]); Exit (1); }    //Open Sourcefps = fopen (argv[1],"R"); if(fps = =NULL) {Perror ("fopen ()"); Exit (1); }    //Open Target StreamFPD = fopen (argv[2],"w+"); if(FPD = =NULL) {Perror ("fopen ()"); Fclose (fps);//when the target stream fails to open, the source will be closedExit1); }     while(1) {ch=fgetc (fps); if(ch = = EOF)//If you read the end of the file or read an error             Break;    FPUTC (CH,FPD);    } fclose (FPD);    Fclose (fps); Exit (0);}

Example two: Calculating the size of a file (fgetc FPUTC use)

/*calculate the size of a file*/#include<stdio.h>#include<stdlib.h>intMainintARGC,Char**argv) {FILE*FP; intCH =0 ; intCount =0 ; if(ARGC <2) {fprintf (stderr,"usage:....\n"); Exit (1); } FP= fopen (argv[1],"R"); if(fp = =NULL) {Perror ("fopen ()"); Exit (1); }     while(1) {ch=fgetc (FP); if(ch = =EOF) Break; Count++; } fprintf (stdout,"count =%d\n", Count);    Fclose (FP); Exit (1);}

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