Fileクラスファイル読み書き関数の例
#include<stdio.h> intmain( void ) { FILE *in,*out; in= fopen ( "\\AUTOEXEC.BAT" , "rt" ); if (in==NULL) { fprintf (stderr, "Cannotopeninputfile.
" ); return 1; } out= fopen ( "\\AUTOEXEC.BAT" , "wt" ); if (out==NULL) { fprintf (stderr, "Cannotopenoutputfile.
" ); return 1; } while (! feof (in)) fputc ( fgetc (in),out); fclose (in); fclose (out); return0; }
#include<stdio.h> #include<stdlib.h> #include<process.h> FILE *stream; int main( void ) { int i=10; double fp=1.5; chars[]= "thisisastring" ; charc= '
' ; stream= fopen ( "fprintf.out" , "w" ); fprintf (stream, "%s%c" ,s,c); fprintf (stream, "%d
" ,i); fprintf (stream, "%f
" ,fp); fclose (stream); system ( "typefprintf.out" ); return0; }
：
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thisisastring 10 1.500000
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#include<stdio.h> intmain() { FILE *fp; inti=617; char *s= "thatisagoodnew" ; fp= fopen ( "text.dat" , "w" ); fputs ( "total" ,fp); fputs ( ":" ,fp); fprintf (fp, "%d
" ,i); fprintf (fp, "%s" ,s); fclose (fp); return0; }
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2 total:617 thatisagoodnew