Roman Numeral Conversion API

If you are looking for an easy way to include Roman Numeral values in your C/C++ programs, the Roman Numeral Conversion API project is a great solution. The project includes a library of functions that can generate Roman Numeral strings from integers or convert Roman Numeral strings into integers. The library comes with example programs that showcase these functions and demonstrate how to use them.

One of the example programs is called `romannum', which generates Roman Numeral strings from integers. Another example program is called `romandate' and it uses the library to create silly tools that you can play with. These examples show possible uses for the functions included in the library.

To use the functions in your own programs, simply include the Roman Numeral Conversion API library and call the appropriate function. For example, the following code generates a Roman Numeral string from the integer value 3132:

```
const char * roman;
roman = long2roman(3132);
if (!(roman))
{
perror("long2roman()");
return(1);
};
printf("Roman Numeral: %sn", roman);
```

If you compile this code on a Posix system and run it, the output should be similar to the following:

```
Roman Numeral: MMMCXXXII
```

Similarly, the following code converts a Roman Numeral string into an integer:

```
int num;
num = roman2long("MMMCXXXII");
if (num < 0)
{
perror("roman2long()");
return(1);
};
printf("Number: %in", num);
```

If you compile and run this code on a Posix system, the output should be similar to the following:

```
Number: 3132
```

If you want more examples of how to use the library's functions, you can check the `examples' directory included with the project. Overall, the Roman Numeral Conversion API project is a useful tool for anyone who needs to work with Roman Numeral values in their C/C++ programs.