/***********************************************************
 * Filename: temp.c
 *
 * A program to measure the processor temperature on the 
 * RaspberryPi.
 * 
 * Compile with the command: gcc -o temp temp.c
 *
 * Execute with the command: ./temp
 *
 **********************************************************/

#include <stdio.h>
#include <fcntl.h>

int infile;

float temp1;

int main()
{
   FILE *infile;
   infile = fopen("/sys/class/thermal/thermal_zone0/temp", "r");

   fscanf(infile, "%f",&temp1);

   temp1/=1000;  
   printf("%.1f C\n", temp1);

   return 0;
}