Question

How to use perror() function to print an error message in C

Answer 1

#include <stdio.h>

int main(void)
{
	FILE *fp;
	char s[256];;
 
	fp = fopen ("d://testt.txt", "r"); 
	if (fp == NULL) 
		perror("Error open file");
	else 
	{
		if (fgets (s , 256 , fp) != NULL)
			puts(s);
		
		fclose(fp);
	}
	
	return 0;
}

 
/*
   
run:
   
Error open file: No such file or directory

*/

 

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