Print the First Non Repeated Character

Question

Get the input string from the user and print the first non repeating character in the string. if there is no Non repeating character print 0.
For Example
input : Hello
result: H
input : xxyyzz
result: 0

Answer 1

char in, cmp{'\0'};
bool repeated{false};
while (std::cin >> in)
{
if (in == cmp)
repeated = true;
if (!repeated && in != cmp)
{
std::cout << in;
break;
}
else
{
cmp = in;
repeated = false;
}
}