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putw(), getw() functions in C

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putw(), getw() functions in C:


putw(), getw() functions are file handling function in C programming language which is used to write an integer value into a file (putw) and read integer value from a file (getw). Please find below the description and syntax for above file handling functions.

File operation
Declaration & Description
putw() Declaration: int putw(int number, FILE *fp);

putw function is used to write an integer into a file. In a C program, we can write integer value in a file as below.
putw(i, fp);

where
i – integer value
fp – file pointer

getw() Declaration: int getw(FILE *fp);

getw function reads an integer value from a file pointed by fp. In a C program, we can read integer value from a file as below.
getw(fp);

Example program for putw(), getw() function in C programming language:

This file handling C program illustrates how to write into a file using putw() function and how to read the same file using getw() function.

Output:

Data in test.c file is
1
2
3

Other Inbuilt file handling functions in C programming language:

C programming language offers many other inbuilt functions for handling files. They are given below. Please click on each function name below to know more details, example programs, output for the respective file handling function.


File handling functions
Description
fopen () fopen () function creates a new file or opens an existing file.
fclose () fclose () function closes an opened file.
getw () getw () function reads an integer from file.
putw () putw () functions writes an integer to file.
fgetc () fgetc () function reads a character from file.
fputc () fputc () functions write a character to file.
gets () gets () function reads line from keyboard.
puts () puts () function writes line to o/p screen.
fgets () fgets () function reads string from a file, one line at a time.
fputs () fputs () function writes string to a file.
feof () feof () function finds end of file.
fgetchar () fgetchar () function reads a character from keyboard.
fprintf () fprintf () function writes formatted data to a file.
fscanf () fscanf () function reads formatted data from a file.
fputchar () fputchar () function writes a character onto the output screen from keyboard input.
fseek () fseek () function moves file pointer position to given location.
SEEK_SET SEEK_SET moves file pointer position to the beginning of the file.
SEEK_CUR SEEK_CUR moves file pointer position to given location.
SEEK_END SEEK_END moves file pointer position to the end of file.
ftell () ftell () function gives current position of file pointer.
rewind () rewind () function moves file pointer position to the beginning of the file.
getc () getc () function reads character from file.
getch () getch () function reads character from keyboard.
getche () getche () function reads character from keyboard and echoes to o/p screen.
getchar () getchar () function reads character from keyboard.
putc () putc () function writes a character to file.
putchar () putchar () function writes a character to screen.
printf () printf () function writes formatted data to screen.
sprinf () sprinf () function writes formatted output to string.
scanf () scanf () function reads formatted data from keyboard.
sscanf () sscanf () function Reads formatted input from a string.
remove () remove () function deletes a file.
fflush () fflush () function flushes a file.

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