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Code Issues Releases Activity

Added compareTo() to comparison operator example

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This commit is contained in:
Tom Igoe 2010-07-27 20:02:29 +00:00
parent dce397c5a4
commit 8a21cd9e9e
1 changed files with 37 additions and 3 deletions
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40
build/shared/examples/8.Strings/StringComparisonOperators/StringComparisonOperators.pde
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@ -52,7 +52,7 @@ void loop() {
Serial.println(stringOne + " >= " + stringTwo);
}
// comparison operators can be used to compare strings for alphabetic sorting too:
// comparison operators can be used to compare strings for alphabetic sorting too:
stringOne = String("Brown");
if (stringOne < "Charles") {
Serial.println(stringOne + " < Charles");
@ -71,8 +71,38 @@ void loop() {
Serial.println(stringOne + " >= Brow");
}
// do nothing while true:
while(true);
// the compareTo() operator also allows you to compare strings
// it evaluates on the first character that's different.
// if the first character of the string you're comparing to
// comes first in alphanumeric order, then compareTo() is greater than 0:
stringOne = "Cucumber";
stringTwo = "Cucuracha";
if (stringOne.compareTo(stringTwo) < 0 ) {
Serial.println(stringOne + " comes before " + stringTwo);
}
else {
Serial.println(stringOne + " comes after " + stringTwo);
}
delay(10000); // because the next part is a loop:
// compareTo() is handy when you've got strings with numbers in them too:
while (true) {
stringOne = "Sensor: ";
stringTwo= "Sensor: ";
stringOne += analogRead(0);
stringTwo += analogRead(5);
if (stringOne.compareTo(stringTwo) < 0 ) {
Serial.println(stringOne + " comes after " + stringTwo);
}
else {
Serial.println(stringOne + " comes before " + stringTwo);
}
}
}
@ -80,3 +110,7 @@ void loop() {