reserve()
描述
String 物件的 reserve() 函式可以配置一塊記憶體空間來存放字串。
語法
string.reserve(size)
參數
string : String 物件 (字串)
size : 要配置的記憶體大小 (用來存放字串) – unsigned int 型別
回傳
無回傳值
範例
String myString;
void setup() {
// 初始化 Serial 並等待序列埠打開:
Serial.begin(9600);
while (!Serial) {
; // 等待序列埠打開。
}
myString.reserve(26);
myString = "i=";
myString += "1234";
myString += ", is that ok?";
// 印出字串:
Serial.println(myString);
}
void loop() {
// 這裡不做任何事
}
See also
- String
The text of the 86Duino reference is a modification of the Arduino reference, and is licensed under a Creative Commons Attribution-ShareAlike 3.0 License. Code samples in the reference are released into the public domain.
