How can I hash a string to an int using c++?

Question

I have to write my own hash function. If I wanted to just make the simple hash function that maps each letter in the string to a numerical value (i.e. a=1, b=2, c=3, ...), i

Answer 1

C++11 ships with a standard hashing function for strings.

https://en.cppreference.com/w/cpp/string/basic_string/hash

#include 
#include // hash
int main(){
    std::string s = "Hello";
    std::size_t hash = std::hash{}(s);
}