I am trying to write a function that reverses the words inside a string keeping spaces between the words. So, if the input is “abc def ghj” output should be “cba fed jhg”. It works when i put the string by hand into the function ReverseLettersDecode(“abc def ghj) for example. However, when i put the parameter of the function with a input it does not work. Example: ReverseLettersDecode(a) where a is input from the user. I am new to the language so please keep that in mind when explaining 🙂 thanks.

string reverseWord(const string& word){
    string reverseword;
    string temp;
    int length = word.length();
    
    for (int i = length-1; i > -1 ; i--){
        temp = word.at(i);
        reverseword += temp;
    }
    return reverseword;
}

string reverseLettersDecode(const string& message){
    string reversedmsg;
    string msg = message;
    int index = msg.find(" ");
    
    while (index != string::npos){
        reversedmsg += reverseWord(msg.substr(0,index)) + " ";
        msg = msg.substr(index+1);
        
        if (msg.find(" ") == string::npos){
            reversedmsg += reverseWord(msg);
            break;
        }
        index = msg.find(" ");
    }
               
    return reversedmsg;
}

This is the code. The first function is for reversing a word and the one below is reversing a sentence with spaces using the first function.