How to pass functions("string") in C++?

Question

linux

Trying to pass a "string array" to the function but it throws an error along with the correct output.

C++:

#include <iostream>
#include <cstring>
using namespace std;

void echo(char* string){
  cout << string << endl;
}

int main(){
  echo("abc");
  return 0;
}

Terminal:

linux>~>cpp> ./build.sh 
main.cpp: In function ‘int main()’:
main.cpp:10:7: warning: ISO C++ forbids converting a string constant to ‘char*’ [-Wwrite-strings]
   10 |  echo("abc");
      |       ^~~~~
abc

Answer 1

You need const char*
And yes, the name coincided with the standard class - not good

Answer 2

string is the name of the STL class.

void echo(char* str){
  cout << str << endl;
}

Answer 3

It is possible through the index

void printer(char *str)
{
    cout << str << endl;
  
}

It is possible through a char array

void printer(char str[])
{
    cout << str << endl;
  
}