10_1 - Lectura/escritura de datos en fichero.

Users » jangelgm » Code » 10_1

Lectura/escritura de datos en fichero.

main.cpp@0:66db9a0438c9, 2017-03-09 (annotated)

Lectura/escritura de datos en fichero.

User	Revision	Line number	New contents of line
jangelgm	0:66db9a0438c9	1	/* Program Example 10.1: read and write char data bytes
jangelgm	0:66db9a0438c9	2	*/
jangelgm	0:66db9a0438c9	3	#include "mbed.h"
jangelgm	0:66db9a0438c9	4	Serial pc(USBTX,USBRX); // setup terminal link
jangelgm	0:66db9a0438c9	5	LocalFileSystem local("local"); // define local file system
jangelgm	0:66db9a0438c9	6	int write_var;
jangelgm	0:66db9a0438c9	7	int read_var; // create data variables
jangelgm	0:66db9a0438c9	8	int main ()
jangelgm	0:66db9a0438c9	9	{
jangelgm	0:66db9a0438c9	10	FILE* File1 = fopen("/local/datafile.txt","w"); // open file
jangelgm	0:66db9a0438c9	11	write_var=0x23; // example data
jangelgm	0:66db9a0438c9	12	fputc(write_var, File1); // put char (data value) into file
jangelgm	0:66db9a0438c9	13	fclose(File1); // close file
jangelgm	0:66db9a0438c9	14	FILE* File2 = fopen ("/local/datafile.txt","r"); // open file for reading
jangelgm	0:66db9a0438c9	15	read_var = fgetc(File2); // read first data value
jangelgm	0:66db9a0438c9	16	fclose(File2); // close file
jangelgm	0:66db9a0438c9	17	pc.printf("input value = %i \n",read_var); // display read data value
jangelgm	0:66db9a0438c9	18	}