Problem with array copying over

[Final9mare]

Hi, I am having trouble with this array. I am shuffling some characters and at the end of one shuffling process I want to copy the "shuffled" array back to the "word" array so that it can be shuffled again. But when I copy it back to the old array, for some reason it is adding a couple of strange characters to it "aebfcgdhei┬jF☻". How can I fix that? Thanks alot.

int main() {
    int len;
    int first = 0;
    int last;
    char shuffled[100];
    char word[100];
    cout << "Please enter your string to be shuffled" << endl;
    cin.getline(word, 100);
    len = strlen(word);
    last = len/2;
    cout << "Length of word is " << len << endl;
    for(int shuffling = 0; shuffling < 10; ++shuffling){
            for(int o = 0; o <= len; ++o){
                    shuffled[o] = word[first];
                    cout << o << " ---------- " << shuffled[o] << endl;
                    ++o;
                    shuffled[o] = word[last];
                    cout << o << " ---------- " << shuffled[o] << endl;
                    first++;
                    last++;
                    }
                    cout << endl;
            for(int p = 0; p <= len; ++p){
                word[p] = shuffled[p];
                }
    cout << "-----------------------Shuffle Number:" << shuffling << " finished-----------------------" << endl;
    }
    system("pause");
}

[coder777]

It is due to this:
for(int o = 0; o <= len; ++o)
and
for(int p = 0; p <= len; ++p)

The problem is '<='. It overwrites the 0 at the end. Write '<' instead

[Final9mare]

Thanks alot, that worked for the first shuffle, but when it does the loop a second time, it has wierd characters again

[Final9mare]

actually nevermind, I figured it out, I was not resetting the first and last increments so it kept incrementing where left off Thanks alot for help