I have been searching everywhere for an answer to this but I can only find the replace() function. That is great but I need to replace all the characters in the string with under scores except for spaces, not just one specific character.
This is for a hangman assignment.
Also I didn't provide any code because I don't need anything changed. I just need the syntax and logic help.
string str("hang man");
for (auto it = str.begin(); it != str.end(); ++it)
{
if (*it!=' ')
{
*it = '_';
}
}
Simple example of doing it with C++ standard library algorithms:
#include <algorithm>
#include <iostream>
#include <string>
int main()
{
std::string str = " this is a test;?";
std::transform(str.begin(), str.end(), str.begin(),
[](char c){return c != ' ' ? '_' : ' ';});
// this also does it
/* std::for_each(str.begin(), str.end(),
[](char& c){if(c != ' ') c = '_';});
*/
std::cout << str;
}
Here's yet another alternative using the standard library algorithm std::replace_if. I like this solution because the name of the algorithm is meaningful and clearly says what it does.
#include <algorithm>
#include <iostream>
#include <string>
int main()
{
std::string str = "I like turtles";
std::replace_if(str.begin(), str.end(), [](char ch){ return ch != ' '; }, '_');
std::cout << str << '\n';
}
