IncrementingFilename - A simple example creating an incrementing filename

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A simple example creating an incrementing filename

main.cpp@0:0c472a310ea9, 2010-03-24 (annotated)

User	Revision	Line number	New contents of line
simon	0:0c472a310ea9	1	// a way to create incrementing filenames, sford
simon	0:0c472a310ea9	2	// every time you hit reset, will create a file with incremental filename
simon	0:0c472a310ea9	3
simon	0:0c472a310ea9	4	#include "mbed.h"
simon	0:0c472a310ea9	5
simon	0:0c472a310ea9	6	LocalFileSystem local("local"); // Create the local filesystem under the name "local"
simon	0:0c472a310ea9	7
simon	0:0c472a310ea9	8	int main() {
simon	0:0c472a310ea9	9	char filename[64];
simon	0:0c472a310ea9	10	int n = 0;
simon	0:0c472a310ea9	11
simon	0:0c472a310ea9	12	// set "filename" equal to the next file to write
simon	0:0c472a310ea9	13	while(1) {
simon	0:0c472a310ea9	14	sprintf(filename, "/local/file%03d.txt", n); // construct the filename fileNNN.txt
simon	0:0c472a310ea9	15	FILE *fp = fopen(filename, "r"); // try and open it
simon	0:0c472a310ea9	16	if(fp == NULL) { // if not found, we're done!
simon	0:0c472a310ea9	17	break;
simon	0:0c472a310ea9	18	}
simon	0:0c472a310ea9	19	fclose(fp); // close the file
simon	0:0c472a310ea9	20	n++; // and try the next one
simon	0:0c472a310ea9	21	}
simon	0:0c472a310ea9	22
simon	0:0c472a310ea9	23	FILE *fp = fopen(filename, "w");
simon	0:0c472a310ea9	24	fprintf(fp, "I am file # %d\n", n);
simon	0:0c472a310ea9	25	fclose(fp);
simon	0:0c472a310ea9	26	}