How to do it?

Example 1:

Code:

int variable0 = 0; 
int variable1 = 1;
int variable2 = 2;
int varabile3 = 3;

int someArray[4] = {10, 20, 30, 40};

//now i can access array indices like: 
someArray[variable0];
someArray[variable1];
someArray[variable2];
someArray[variable3]; 

Now I would like to do something like example above on the runtime:

Example 2:

Code:

void addVariableName(std::string name) 
{
//add variable name and assign following number to it starting from 0
}

addVariableName("variable0");
addVariableName("variable1");
addVariableName("variable2");
addVariableName("variable3");

someArray[/*????*/]; //want to access element 0 here using string "variable0"
someArray[/*????*/]; //want to access element 1 here using string "variable1"
someArray[/*????*/]; //want to access element 2 here using string "variable2"
someArray[/*????*/]; //want to access element 3 here using string "variable3" 

Is there any way to do it? (in the same time as in example 1)