Sum of 2 strings in another string

[Victor89]

This question is very simple but I can't figure it out, I know how to do it with arrays, but now I need to to it with strings.

  int main()
{
	char A[10], B[10];
	char C[10];  //the string where we will calculate the sum
	
	cout<<"Enter first string: ";
	cin.getline(A, 10);  //reading the first string

	cout<<"Enter second string: ";
	cin.getline(B, 10);   //reading the second string

	C[10]= A[10] + B[10];  //this doesn't work
	cin.getline(C, 10);

	cout<<C<<endl;

So I input in the first and second string some digit. I want to output their sum in the third string.

[Aceix]

C[10]= A[10] + B[10]; //this doesn't work

This piece of code would not work.
1. Arrays use zero based indices. You are therefore accessing somewhere out of you array.
2. The memory allocated for C is too small. As it is taking a sum, it must have space of at least 20.
3. You. must do the assignment index by index.
4. Std::string is a better idesa.

Aceix.