39 lines
766 B
C++
39 lines
766 B
C++
|
#include <iostream>
|
||
|
|
#include <string>
|
||
|
|
#include <string_view>
|
||
|
|
|
||
|
|
using namespace std;
|
||
|
|
|
||
|
|
string repeat1(string_view s) {
|
||
|
|
return string{s} + string{s};
|
||
|
|
}
|
||
|
|
|
||
|
|
void repeat2(string& s) {
|
||
|
|
s += s;
|
||
|
|
}
|
||
|
|
|
||
|
|
void repeat3(string* s) {
|
||
|
|
*s += *s;
|
||
|
|
}
|
||
|
|
|
||
|
|
string* repeat4(string_view s) {
|
||
|
|
string* result = new string;
|
||
|
|
*result = string{s} + string{s};
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
int main() {
|
||
|
|
string meow;
|
||
|
|
cin >> meow;
|
||
|
|
|
||
|
|
cout << "test of repeat1:" << endl << repeat1(meow) << endl;
|
||
|
|
|
||
|
|
repeat2(meow);
|
||
|
|
cout << "test of repeat2:" << endl << meow << endl;
|
||
|
|
|
||
|
|
repeat3(&meow);
|
||
|
|
cout << "test of repeat3:" << endl << meow << endl;
|
||
|
|
|
||
|
|
cout << "test of repeat4:" << endl << *repeat4(meow) << endl;
|
||
|
|
}
|