Vectors and Arrays

Character Arrays

Generally it is best to avoid the use of character arrays - the string class is safer and far more convenient.
Occasionally you need to convert a string into a character array to call a function that was written before the string class was invented.
Example: to convert a character array containing digits into its integer value.
```
int atoi(const char s[])
```
Use the c_str member function to convert a string into a character array.
```
string year = "1999";
int y = atoi(year.c_str());
```