C++ Question

Question

Write a function that takes an input string. As output, add and return letter by letter to string.
example: input: Code
output : CCoCodCode

Answer 1

std::string repeatString(std::string input){
std::string output;

for(int i = 0; i < input.length(); i++){
for(int j = 0; j <= i; j++){
output += input[j];
}
}
return output;
}