String to int

/**
*  getInt.cpp
*  Converts numerical string into an integer
*
*  Author: Marcelo Shiniti Uchimura
*  When:  Jan '09
*/
byte incomingByte = 0;  // for incoming serial data
int value = 0; // for storing the input decimal value

void setup() {
 Serial.begin(9600);  // opens serial port, sets data rate to 9600 bps
}

void loop() {
 // send data only when you receive data:
 if (Serial.available() > 0) {
   // read the incoming byte:
   incomingByte = Serial.read();
   if(incomingByte == 13) {
     Serial.println();
     Serial.println(value, DEC);
     value = 0;
   }
   else
     value = value * 10 + incomingByte - 0x30;
 }
}