got a error from c use js function

[黄武韬]

i got a error like this:
clang++: warning: treating 'c' input as 'c++' when in C++ mode, this behavior is deprecated [-Wdeprecated]
error: undefined symbol: add

[Scott Lott]

Could you submit the code you're using?

[黄武韬]

i used a wrong way to use js function in c. i resolved this problem