A bit complicated calculation...

[sampark85]

Hey guys,

I am trying to figure out how to write a program that will output

"What is your name? Sam

Your name score is: 23"

Something like that.

I would like to make a=1, b=2, c=3, d=4 ... z=26.
When someone inputs their name with keyboard, the program will convert those letters into numbers 1~26 and add them up.

Is that possible?

Thank you for your time!!

[vlad from moscow]

Yes, it is possible. I hope I have answered your question.:)

[sampark85]

That's good to know,

would you by any chance know how to write the code?

Thanks!!

[Zhuge]

Yeah, I think several of the people on this forum could do it.

[vlad from moscow]

You can write it silently or listening to a music.

[sampark85]

Can anyone help me with the code if it's not too time consuming?

I have tried but apparently my knowledge in C++ isn't sufficient to write such code.

This is what I have so far, I don't know what to do :(

#include <iostream>
using namespace std;



int main ()
{
    char name;

    int result;
    int a=1, b=2, c=3, d=4, e=5;
    
    
    
    cout<<"What is your name: ";
    cin>>name;
    cout<<endl;
    
    result = name;
    cout<<result<<endl;
    
    
    
    system ("pause");
    return 0;
}

This isn't an assignment or anything, just something I wanted to challenge myself to try. I took a C++ course back in 2010, but forgot most of it. I am planning to write a code for making weekly schedule after this one. But seems like I am far away from that.

[vlad from moscow]

The difference

LetterOfTheWord - 'A' + 1

will give you required number provided that all letters in the alphabet folow each other.

For example

std::string s( "This is your name" );

int number = 0;

for ( std::string::size_type i = 0; i < s.size(); i++ ) 
{
   number += std::toupper( s[i] ) - 'A' + 1;
}

The loop can be written even simply

for ( auto c : s ) number += std::toupper( c ) -'A' + 1;

[sampark85]

I think the part that I don't understand is how I could take an input that is unknown, and make it into an expression to add the letters among the input.

Like, if someone inputs Sam, how do I convert that to 19 1 13, then add 19 + 1 + 13.

Any tips?

[vlad from moscow]

I have shown you already.

[sampark85]

Oh, I didn't see. let me try that.

Sorry, I don't know where to put that or how to utilize the codes you wrote :/

[vlad from moscow]

#include <iostream>
#include <string>
#include <cstdlib>
#include <cctype>

using namespace std;

int main ()
{
    string name;

    cout << "What is your name: ";
    cin >> name;

    int result = 0;
    for ( auto c : name ) result += toupper( c ) -'A' + 1; 

    cout << endl << result << endl;
    
    system( "pause" );
    return 0;
}

[sampark85]

Thank you,

I tried to run that on my dev C++ but it gave me error saying "expected primary -expression before "auto" and expected ';' before "auto"and expected ')' before ';' token. this is for "for ( auto c : name ) result += std::toupper( c ) -'A' + 1; "

[vlad from moscow]

Change the loop to this one

for ( string::size_type i = 0; i < s.size(); i++ ) 
{
   result += toupper( name[i] ) - 'A' + 1;
}

[sampark85]

It WORKED!!!

#include <iostream>
#include <string>
#include <cstdlib>
#include <cctype>

using namespace std;

int main ()
{
string name;

cout<<"What is your name: ";
cin>>name;

int result = 0;
for ( string::size_type i = 0; i < name.size(); i++ ) 
{
   result += toupper( name[i] ) - 'A' + 1;
}

cout<< endl << result<<endl;

system ("pause");
return 0;
}

at first i got error saying s was undeclared, so i just changed the s to name.

One more question, if I was to make this into 2 variable, first name, last name, do i just write the same loop twice for the 2nd variable?

[vlad from moscow]

You can write a function that will return a number for a given word.

[sampark85]

for ( string::size_type i = 0; i < name.size(); i++ ) 
{
   result += toupper( name[i] ) - 'A' + 1;
}

does that line of code take the letters from variable name (ex: s = 19 a =1 m=13) and then subtract A value which is 1 (ex: s=19-1 a=1-1 m=13-1) then +1 gives a +1 value to the letters that was input.

is that that line of code works?

[vlad from moscow]

'A' - 'A' is equal to zero. So 'A' -'A' + 1 is equal to 1. 'B' - 'A' is equla to 1. So 'B' - 'A' + 1 is equal to 2. And so on provided that all letters follow each other.

[sampark85]

Thank you, I think i understand the codes!

Looking forward to work on my next challenge whenever I have more free time! hehe