What is a simple way to convert a string to a numeric value in C++11? This is sometimes needed when data is input as a string but we need to perform numeric computations on the values.

What will be an ideal response?

Use the stod or stoi functions. These functions convert a string to a
double or integer, respectively. For example:
```
double d = stod("33.55"); // d = 33.55
int i = stoi("100"); // i = 100
```