C fseek( )

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This function is used to set the file pointer to the specified offset. It is used to write data into the file at the desired location.

Syntax:

int fseek(FILE *stream,long int offset, int whence)

 

The fseek() function used three constants such as:

SEEK_SET, SEEK_CUR AND SEEK_END.

Example:

#include <stdio.h>
#include <stdlib.h>

void main()
{
	FILE *fp;
	fp=fopen("TEST.txt","w+");
	fputs("Onlinetpoint for",fp);
	fseek(fp,20, SEEK_SET);
	fputs("C program Language",fp);
	fclose(fp);
}
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