การใช้ Turbo C ชุดที่ 13 File IO โดย อ.กำธร เรือนฝายกาศ มหาวิทยาลัยเทคดนโลยีราชมงคลล้านนา วิทยาเขคภาคพายัพ

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4. #include stdio.h
#include conio.h
int main(void)
{
FILE *fp;
char FileName[64];
char a;
clrscr();
printf(filename = );
scanf( %s , FileName);
fp = fopen(FileName, r);
if(fp == NULL)
exit(-1);
do{
a = getc(fp);
printf(%c, a);
}while(a != EOF);
fclose(fp);
getch();
}
filename = gcc1201.c
#include stdio.h
#include conio.h
int main(void)
{
FILE *fp;
char FileName[64];
char a;
clrscr();
printf(filename = );
scanf(%s,FileName);
fp = fopen(FileName,r);
if(fp == NULL)
exit(-1);
do{
a = getc(fp);
printf(%c, a)
}while( a != EOF );
fclose(fp);
getch();
}

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6. #include stdio.h
#include conio.h
int main(void)
{
FILE *fp;
char FileName[64];
char a;
clrscr();
printf(new file name = );
scanf(%s,FileName);
fp = fopen(FileName,w+);
if(fp == NULL)
exit(-1);
do
{
scanf(%c, a );
if( a == '~') break;
if( putc( a, fp) == NULL) exit(-1);
}while(1);
fclose(fp);
}
new file name = test.tx
hello world
1234567890~

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8. #include stdio.h
#include conio.h
int main(void)
{
FILE *fp;
char FileName[64];
float a = 123.4567890;
char b[16] = HelloWorld;
int c = 123;
clrscr();
printf(new file name = );
scanf(%s,FileName);
fp = fopen(FileName,w);
if(fp == NULL) exit(-1);
fprintf( fp, %f %s %d, a, b, c);
fclose(fp);
a = 0;
strcpy( b, );
c = 0;
printf(open file name = );
scanf(%s,FileName);
fp = fopen(FileName,r);
if(fp == NULL) exit(-1);
fscanf( fp, %f %s %d, a, b, c);
printf(%f %s %d, a, b, c);
fclose(fp);
getch();
}
new file name = test.dat
open file name = test.dat
123.456787 Hello 0

9. -6-
#include stdio.h
#include conio.h
int main(void)
{
FILE *fp;
char FileName[64];
float a = 'z';
char b[16] = HelloWorld;
int c = 123;
clrscr();
printf(new file name = );
scanf(%s,FileName);
fp = fopen(FileName,w);
if(fp == NULL) exit(-1);
putw( c, fp);
fclose(fp);
c = 0;
printf(open file name = );
scanf(%s,FileName);
fp = fopen(FileName,r);
if(fp == NULL) exit(-1);
c = getw(fp);
printf(%d, c);
fclose(fp);
getch();
}
new file name = test2.dat
open file name = test2.dat
12345

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