鍦–++涓紝string.empty()鏄敤鏉ュ垽鏂竴涓瓧绗︿覆鏄惁涓虹┖鐨勫嚱鏁般€傚畠杩斿洖涓€涓猙ool鍊硷紝濡傛灉瀛楃涓蹭负绌猴紝鍒欒繑鍥瀟rue锛屽惁鍒欒繑鍥瀎alse銆?/p>

浠ヤ笅鏄娇鐢?code>string.empty()鐨勭ず渚嬶細

#include <iostream>
#include <string>
int main() {
std::string str1 = "Hello";
std::string str2 = "";
if (str1.empty()) {
std::cout << "str1 is empty" << std::endl;
} else {
std::cout << "str1 is not empty" << std::endl;
}
if (str2.empty()) {
std::cout << "str2 is empty" << std::endl;
} else {
std::cout << "str2 is not empty" << std::endl;
}
return 0;
}

杈撳嚭缁撴灉涓猴細

str1 is not empty
str2 is empty

鍦ㄤ笂闈㈢殑渚嬪瓙涓紝str1涓嶄负绌猴紝鎵€浠?code>str1.empty()杩斿洖false銆傝€?code>str2涓虹┖锛屾墍浠?code>str2.empty()杩斿洖true銆?/p>