How do I convert ASCII to Integer (c++)

Anon

How do I convert ASCII to Integer WITHOUT USING THE ATOI FUNCTION? Could you be so kind and send me a little source code?
(What is the source code behind the atoi () funcion?)

Thank you very much,
Stefano

Anon

In PHP? $num=0+$string.

In C++? Ask in a C++ coders' forum.

Anon

#include <iostream.h>

int main()
{
char symbol; //declaration of variable

cout<<"Type a ASCII-symbol: "<<endl; //input symbol
cin>>symbol;

cout<<int(symbol);  //output integer value of the symbol

return 0;
}