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node_modules/node-sass/src/libsass/docs/api-value-example.md

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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
+```