Adressing variable using a string and an int in Arduino - variables

Question

I wonder how I can address a variable by putting together a string and an int in Arduino.
I´m using many variables of the same type and with almost the same name. I´m just append a number to each variable.
The names of the variables are e.g. int sensorValue_1; int sensorValue_2; and so on.
I´d like to write less because my code is becoming too long.
When addressing the variables, I´d like to write something like this: sensorValue_[+ intVariable];
Here is an example of what I mean:
int sensorIndex_1 = 1;
int sensorIndex_2 = 2;
int sensorIndex_3 = 3;
int sensorValue_1;
int sensorValue_2;
int sensorValue_3;
void setup()
{
Serial.begin(9600);
}
void loop()
{
doSomething(sensorIndex_1);
//doSomething(sensorIndex_2);
//doSomething(sensorIndex_3);
}
void doSomething(int sensorIndex)
{
if(sensorIndex == 1)
{
Serial.print("Sensor 1: ");
sensorValue_1 = analogRead(A1);
Serial.println(sensorValue_1);
}
if(sensorIndex == 2)
{
Serial.print("Sensor 2: ");
sensorValue_2 = analogRead(A2);
Serial.println(sensorValue_2);
}
if(sensorIndex == 3)
{
Serial.print("Sensor 3: ");
sensorValue_3 = analogRead(A3);
Serial.println(sensorValue_3);
}
delay(1000);
}
And I want to shorten the code in the doSomething() method.
I want to have something like this:
Notice the "[+ sensorIndex]"
void doSomething(int sensorIndex)
{
Serial.print("Sensor [+ sensorIndex]: ");
sensorValue_[+ sensorIndex] = analogRead(A[+ sensorIndex]);
Serial.println(sensorValue_[+ sensorIndex]);
delay(1000);
}
By the way: I´d like to avoid for-loops, if possible.
In my case, the code would become too complicated.
How do I manage this?

Answer 1

User2461391 has a great start but the rest of the puzzle I think you want is:
int array1[3];
int array2[3];
int arrayx[3];
void setup()
{
}
void loop()
{
int index=1;
array1[2]=doSomething(2);
arrayx[index]=doSomething(index);
Serial.print("Sensor ");
Serial.print(index);
Serial.print(": ");
Serial.println(arrayx[index]);
while(1);
}
int doSomething(int sensorIndex) // It probably makes more sense to return the value
{
return (analogRead(sensorIndex));
}

Answer 2

You don't need to use A1 and A2 and the likes to define the analog pin you want to read. Just 1 or 2 will do.
void doSomething(int sensorIndex)
{
Serial.print("Sensor ");
Serial.print(sensorIndex);
Serial.print(": ");
sensorValue = analogRead(sensorIndex);
Serial.println(sensorValue);
delay(1000);
}