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Get value for variable name defined as string

Hello,

I would like to known if it possibe to obtain a value of variable defined as string.

For example:

char* varname[] = {"test", "dog"}
test = 5;
dog = 8;

Can I obtain value of varname[1]???

I use C++.

Best regards.

homework eh?
at least try something.

Quote:

Originally Posted by bigearsbilly (Post 3761054)

homework eh?
at least try something.

Hello,

I am sorry, but I dont understand what are you tried to say.
Homework??? at least, ten years or more last time when I have opened a book to study.

I have try some code, but it is to insert all variables in a list.

Code:

#include <iostream>

#include <map>

#include <utility> // make_pair

using namespace std;

 

int main()

{

        typedef map<char, int> mapType;

        mapType myMap;

 

        // insert elements using insert function

        myMap.insert(pair<char, int>('a', 1));

        myMap.insert(pair<char, int>('b', 2));

        myMap.insert(pair<char, int>('c', 3));

        myMap.insert(mapType::value_type('d', 4)); // all standard containers provide this typedef

        myMap.insert(make_pair('e', 5));          // can also use the utility function make_pair

 

        // erase the first element using the erase function

        mapType::iterator iter = myMap.begin();

        myMap.erase(iter);

 

        // output the size of the map

        cout << "Size of myMap: " << myMap.size() << '\n';

 

        cout << "Enter a key to search for: ";

        char c;

        cin >> c;

 

        // find will return an iterator to the matching element if it is found

        // or to the end of the map if the key is not found

        iter = myMap.find(c);

        if( iter != myMap.end() ) 

                cout << "Value is: " << iter->second << '\n';

        else

                cout << "Key is not in myMap" << '\n';

 

        // clear the entries in the map

        myMap.clear();

}

but it is very hard to handle several variables.
Then, I have look for information about it, and I dont find clear information (tcl_getvar of tcl library, but I dont know if I can use it)

And now, I am here, to look for help, but I see that it is very hard to find it.

And know in my language, No se por que te pones asi o por que me saltas con eso de que si son "homework". Me parece que la respuesta esta fuera de contexto y no tengo ganas de discutir con nadie.

Best regards

since its not homework, then tell us what you are trying to do? A low level system programming project?? driver programming?? game programming?? If they are not one of these, then i suggest learning and using a scripting language instead. they have easier to use data structures and much more.

Quote:

Originally Posted by ghostdog74 (Post 3761133)

Ok!!

Well, I have develop program, Qt with Rt threads that controlled a machine.
It works fine.
Now I am interesting to read some variables in a webserver.
My idea is use mysql server and connect webpage to mysql table where is a name of var and value. Webpage and mysql works.

But now I have problem. I have a file where is the name of variables that I would like to read value a insert in mysql table, and I dont know how to eval value for variable name defined as string.

Code:

sprintf(sql_consulta, "UPDATE watch set value = '%ld' WHERE name='contador1'", counter.general);

mysql_query(conn, sql_consulta);

For example, counter.general is a var of program, and in file there is a line with this string "counter.general".

More or less, this is I trying to do.

Best regards.