CODEWITHSUNDEEP
c++c++11c++14
suman
suman

Reputation: 113

How can i convert string to variable

I have a function in which i am receiving a string values .

Based on the value i want to create a variable.

Template<typename T>
void func( std::string str , T value )
{
    if( str == "int" )
     {
          int val = value;

     }

     if( str == "double" )
     {
          double val = value;

     }

    if( str == "string" )
     {
          std:string val = value;

     }    
}

is it possible to automate this function , instead of having lot of if conditions ?

Upvotes: 0

Views: 67

Answers (1)

Anurag Yadav
Anurag Yadav

Reputation: 294

You have done great, created a template function to check the variable type, and then create a variable of that type.

For this, c++11 has introduced the auto, for variables, specifies that the type of the variable that is being declared will be automatically deduced from its initializer. c++ auto

#include <iostream> // std::cout
#include <string> // std::string
#include <typeinfo> // to check type info

template <typename T>
void func(T value){
    auto val = value; // correctly auto deduced type by compiler(since c++11).

    std::cout << typeid(val).name() << std::endl; // check the auto deduced type info
}

int main(){

    // try
    func(12); // output-> i
    func(12.3); // output -> d
    func("Hello world");

    return 0;
}

Upvotes: 1

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