aaac7fed
 liuqimichale
add
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## Example operation.c
```C
#include <stdio.h>
#include <string.h>
#include "sass/values.h"
int main( int argc, const char* argv[] )
{
// create two new sass values to be added
union Sass_Value* string = sass_make_string("String");
union Sass_Value* number = sass_make_number(42, "nits");
// invoke the add operation which returns a new sass value
union Sass_Value* total = sass_value_op(ADD, string, number);
// no further use for the two operands
sass_delete_value(string);
sass_delete_value(number);
// this works since libsass will always return a
// string for add operations with a string as the
// left hand side. But you should never rely on it!
puts(sass_string_get_value(total));
// invoke stringification (uncompressed with precision of 5)
union Sass_Value* result = sass_value_stringify(total, false, 5);
// no further use for the sum
sass_delete_value(total);
// print the result - you may want to make
// sure result is indeed a string, altough
// stringify guarantees to return a string
// if (sass_value_is_string(result)) {}
// really depends on your level of paranoia
puts(sass_string_get_value(result));
// finally free result
sass_delete_value(result);
// exit status
return 0;
}
```
## Compile operation.c
```bash
gcc -c operation.c -o operation.o
gcc -o operation operation.o -lsass
./operation # => String42nits
```
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