This example is for Wiring version 0027+. If you have a previous version, use the examples included with your software. If you see any errors or have comments, please let us know.
Iteration over digital inputs.
Iteration with a "for" structure over input pins. button switches are wired from pins 0 to 3 depending the number of pressed buttons a variable named "force" will hold different values from 0 to 4
int force;
void setup() {
Serial.begin(9600);
for(int i = 0; i < 4; i++) { // sets pins 0-3 as inputs
pinMode(i, INPUT);
}
}
void loop() {
force = 0;
for(int i = 0; i < 4; i++) { // calculates how many buttons are pressed
if(digitalRead(i) == HIGH) {
force = force + 1; // add 1 to force if the button is pressed
}
}
Serial.print("force is: "); // print the force value
Serial.println(force, DEC);
delay(200); // wait 200ms for next reading
}