Error "error: invalid types ‘char[int]’ for array subscript" in C++.

Question

Hello,
I have this code that gives me the error from the title:

This is problem statement:

Given a string of "s" consisting of two words separated by space (first name and name), write the two words formatted so that the first word (first name) starts with a capital letter and the rest of the characters are written in normal letters and the second word (name) should be written in capital letters only

Input: s "mAriN Ion"
And the expected output must be : s2 "Marin ION"

#include <iostream>
#include <cstring>
#include <string.h>

using namespace std;
int main()
{
char s[50], s2[50];
cin.getline(s, 50);
char *pp = strtok(s, " ");
while (pp != NULL){
pp = strtok(NULL, " ");
}
tolower(pp[1]);
pp[1][1] = char(int(pp[1][1]) - 32);
toupper(pp[2]);
strcat(s2, pp[1]);
strcat(s2, pp[2]);
cout << s << "\n" << s2;
return 0;
}

https://code.sololearn.com/c1KqiUbbqlEc/#cpp

Someone can explain me how to solve this error.
Thank you very much.

Answer 1

Joita Vladut , most important thing to observe is pp[1][1].

Being pp as char* , it is having single dimension array of char.... So at max you should be doing to index pp is level one... It means pp[x] , where x is index zero to max length minus 1, is allowed...

pp[][] is double index and it is not allowed on char*... It could have been allowed if pp would have been char** i.e. double pointer.