Question

How to write (output) a text line to a text file in C

Answer 1

#include <stdio.h>

int main(void)
{
	FILE *fp;
	char s[256] = "a text line";
 
	fp = fopen ("d://test.txt", "w"); // w - create or rewrite the file
	fputs (s, fp);
	fclose (fp);
	
	return 0;
}

 
/*
   
run:
   
check the file: d://test.txt

*/

 

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Answer 2

#include <stdio.h>

int main(void)
{
	FILE *fp;
	char s[256] = "\r\na text line";
 
	fp = fopen ("d://test.txt", "a"); // a - append to file
	fputs (s, fp);
	fclose (fp);
	
	return 0;
}

 
/*
   
run:
   
check the file: d://test.txt

*/

 

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