break_camel_case

t11e12.breakCamelCase.cpp

// t11e12.breakCamelCase.cpp
// juanfc 2023-11-22
// https://gist.github.com/b9fae927922b3c426f5c7a32a7655b2a

#include <iostream>
using namespace std;

// proto
string breakCamelCase(string s);

int main()
{
    cout << breakCamelCase("camelCasing") << endl;
    cout << breakCamelCase("__A__aA_A_") << endl;
    cout << breakCamelCase("camelC") << endl;
    cout << breakCamelCase("camElC") << endl;
    cout << breakCamelCase("APPLE") << endl;
    return 0;
}

// functions
bool isUpperCase(char c);

string breakCamelCase(string s)
{
    string r;
    for (int i = 0; i < s.length(); i++) {
        if (isUpperCase(s[i])) {
          if (i > 0 and s[i-1] != '_')
            r += '_';
          r +=  (s[i] + ('a'-'A'));
        } else
          r += s[i];
    }
    return r;
}

bool isUpperCase(char c)
{
    return (c >= 'A' and c <= 'Z');
}