Reading a written string from a file

[collude]

Hi, Just wondering how to read a string I have written to this file, for verification that it was written to the file. If I do printf and read c string, it isn't verifying it was written to the file.

#include <stdio.h>
#define FILENAME "data.txt"

int main(void)
{
	char rating[20]="Good";

	FILE *data_1;

	data_1 = fopen("data","w");
	
	if(data_1==NULL)
	printf("error Opening file");
	
	else
	{
		fprintf(data_1,"%s", rating); /* writes the c string rating to file*/
	}
	/* don't know how to print what is in datafile to screen*/
	
	fclose(data_1);
	return 0;
	
}

Cheers

[std10093]

You want to read(only) from a file so you have to type

data_1=fopen("data","r");

[mike65535]

Why not close the file, then open it again, read what's in it into an array/string, and then print it?

[collude]

So there is no way to read directly from a file, I must open then feed it into an array, then read string into array?

[CommonTater]

If you open the file in "w+" mode... you can write to it, seek() back to the beginning, and read it back into a string.
If you write more than one line, it's a bit more complex but the concept is the same.

However... if you told it to write and got no run time errors, you can trust it's written. Most OSs will tell you about disk errors.