Please rewrite this in C language (thermostat program using python) Please send screenshot of the code. Make sure it compiles and runs!

		+
		+ Uses a 1N4148 diode as a temperature sensor. Uses a GPIO pin and a relay
		+ to switch an external load when the temperature crosses a threshold set
		+ by a potentiometer.
		+"""
		+
		+import os, collections, glob, time, atexit
		+
		+
		+# Set to True to have the relay engaged when the temperature falls below
		+# the set threshold:
		+SWITCH_WHEN_COLDER = True
		+
		+# Or set to False to have the relay engaged when the temperature rises
		+# above the set threshold:
		+#SWITCH_WHEN_COLDER = False
		+
		+# Used to avoid rapid switching when the temperature is right at the
		+# threshold. The relay will be engaged when it is this many degrees past
		+# the threshold, and will be disengaged once it has returned this many
		+# degrees past the threshold in the other direction:
		+HYSTERESIS = 2 # in degrees C
		+
		+# The temperature will be sampled once every SAMPLE_INTERVAL seconds
		+SAMPLE_INTERVAL = 0.125 # in seconds
		+
		+# Used to calibrate the measured temperature by offsetting it either
		+# positively or negatively:
		+TEMP_OFFSET = 0 # in degrees C
		+
		+
		+AIN_DIR = glob.glob('/sys/devices/ocp.*/thermostat-AIN.*')[0]
		+TEMPERATURE_FILE = '%s/AIN1' % AIN_DIR
		+THRESHOLD_FILE = '%s/AIN3' % AIN_DIR
		+
		+RELAY_GPIO_NUM = '67' # GPIO2_3 = 2x32 + 3
		+GPIO_BASE_DIR = '/sys/class/gpio/gpio%s' % RELAY_GPIO_NUM
		+
		+
		+def switchOff():
		+ """ Disengages the relay. """
		+ with open('%s/value' % GPIO_BASE_DIR, 'wb') as f:
		+ f.write('0')
		+
		+
		+def switchOn():
		+ """ Engages the relay. """
		+ with open('%s/value' % GPIO_BASE_DIR, 'wb') as f:
		+ f.write('1')
		+
		+
		+def relayInit():
		+ """ Initializes the relay pin using the sysfs driver and ensures it is
		+ turned off. """
		+ if not os.path.exists(GPIO_BASE_DIR):
		+ # The control directory for this pin doesn't exist yet, which means it
		+ # needs to be exported for userspace control:
		+ with open('/sys/class/gpio/export', 'wb') as f:
		+ f.write(RELAY_GPIO_NUM)
		+ # Give the driver time to create the interface:
		+ time.sleep(0.5)
		+
		+ # Set the pin as an output:
		+ with open('%s/direction' % GPIO_BASE_DIR, 'wb') as f:
		+ f.write('out')
		+ # Make sure the relay is off:
		+ switchOff()
		+
		+ # This ensures that the relay will be turned off when the program exits:
		+ atexit.register(switchOff)
		+
		+
		+def getMicroVolts(ain_file):
		+ """ Reads the value from the given AIN file, converts it to an integer
		+ and returns it. """
		+ with open(ain_file, 'rb') as f:
		+ # Sometimes you end up trying to read the file while the kernel driver
		+ # is writing to it, resulting in an IOError. To prevent this from
		+ # crashing the program we try up to three times to read the file:
		+ for i in range(3):
		+ try:
		+ uv = int(f.read())
		+ # We got the value without an error, return:
		+ return uv
		+ except IOError:
		+ continue
		+ # If we make it here it's failed 3 times in a row, something else is
		+ # probably not working.
		+ raise Exception('could not read %s' % ain_file)
		+
		+
		+def uvToTemp(uv):
		+ """ Converts a voltage in microvolts as measured on the diode, converts
		+ to degrees C and returns. """
		+ return -0.0005625535 * uv + 410.5644360774 + TEMP_OFFSET
		+
		+
		+def getTempC():
		+ """ Returns the approximate temperature of the 1N4148 diode. """
		+ uv = getMicroVolts(TEMPERATURE_FILE)
		+ return uvToTemp(uv)
		+
		+
		+def getThreshold():
		+ """ Returns the threshold temperature set by the potentiometer. """
		+ uv = getMicroVolts(THRESHOLD_FILE)
		+ # Because the potentometer has the same range and scaling as the voltage
		+ # from the diode we can use the same function to convert its voltage into
		+ # a temperature:
		+ return uvToTemp(uv)
		+
		+
		+def run():
		+ """ Runs the thermostat program until ctrl-c is pressed. """
		+ relayInit()
		+ engaged = False # Keep track of relay state for printing
		+ try:
		+ while(True):
		+ temp = getTempC()
		+ thresh = getThreshold()
		+
		+ # The thermostat logic:
		+ if temp >= thresh + HYSTERESIS:
		+ if SWITCH_WHEN_COLDER: switchOff()
		+ else: switchOn()
		+ elif temp <= thresh - HYSTERESIS:
		+ if SWITCH_WHEN_COLDER: switchOn()
		+ else: switchOff()
		+
		+ # Log the values to the terminal:
		+ if engaged:
		+ print "temp=%i C - thresh=%i C - relay engaged" % (temp, thresh)
		+ else:
		+ print "temp=%i C - thresh=%i C - relay disengaged" % (temp, thresh)
		+
		+ # Wait the set interval:
		+ time.sleep(SAMPLE_INTERVAL)
		+
		+ except KeyboardInterrupt:
		+ print "Exiting"
		+ exit(0)
		+
		+
		+if __name__ == '__main__':
		+ run()