#include
#include
#include
using namespace std;
vector strToUtf8(string str) {
vector utf8;
for (int i = 0; i < str.size(); i++) {
char c = str[i];
if (c < 0x80) {
utf8.push_back(c);
} else if (c < 0x800) {
utf8.push_back(0xc0 | (c >> 6));
utf8.push_back(0x80 | (c & 0x3f));
} else if (c < 0x10000) {
utf8.push_back(0xe0 | (c >> 12));
utf8.push_back(0x80 | ((c >> 6) & 0x3f));
utf8.push_back(0x80 | (c & 0x3f));
} else {
utf8.push_back(0xf0 | (c >> 18));
utf8.push_back(0x80 | ((c >> 12) & 0x3f));
utf8.push_back(0x80 | ((c >> 6) & 0x3f));
utf8.push_back(0x80 | (c & 0x3f));
}
}
return utf8;
}
int main() {
string str = "你好，世界！";
vector utf8 = strToUtf8(str);
for (int i = 0; i < utf8.size(); i++) {
cout << hex << utf8[i] << " ";
}
cout << endl;
return 0;
