#include <stdio.h>
void copyString(char *source, char *destination) { // hàm sao chép chuỗi
while (*source) {
*destination = *source;
source++;
destination++;
}
*destination = '\0'; // Kết thúc chuỗi đích
}
int main() {
char source[] = "Hello, world!";
char des[100];
copyString(source, des);
return 0;
}
I2luY2x1ZGUgPHN0ZGlvLmg+Cgp2b2lkIGNvcHlTdHJpbmcoY2hhciAqc291cmNlLCBjaGFyICpkZXN0aW5hdGlvbikgeyAvLyBow6BtIHNhbyBjaMOpcCBjaHXhu5dpCiAgd2hpbGUgKCpzb3VyY2UpIHsKICAgICpkZXN0aW5hdGlvbiA9ICpzb3VyY2U7CiAgICBzb3VyY2UrKzsKICAgIGRlc3RpbmF0aW9uKys7CiAgfQogICpkZXN0aW5hdGlvbiA9ICdcMCc7IC8vIEvhur90IHRow7pjIGNodeG7l2kgxJHDrWNoCn0KCmludCBtYWluKCkgewogIGNoYXIgc291cmNlW10gPSAiSGVsbG8sIHdvcmxkISI7CiAgY2hhciBkZXNbMTAwXTsKICBjb3B5U3RyaW5nKHNvdXJjZSwgZGVzKTsKCiAgcHJpbnRmKCIlcyAiLCBkZXMpOwogIHJldHVybiAwOwp9