UNIX for Dummies Questions & Answers

I want to search files (basically .cc files) in /xx folder and subfolders.
Those files (*.cc files) must contain #include "header.h" AND x() function.

I am writing it another way to make it clear,
I wanna list of *.cc files that have 'header.h' & 'x()'. They must have two strings, header.h is one string and x() is another string. All the files in the result must be from /xx folder and subfolders inside this.

I tried several ways, and got only files with header.h OR x().
Some examples given in Internet doesn't give any result in my system.

Try:

Code:

find . -type f -name "*.cc"| xargs grep -l header\.h | xargs grep -l 'x()'

Now I see why the multiple greps work. '-l' slims down the filelist. I got awk to also do it but it is not as simple.

Code:

 find . -name '*.cc' -exec \
   awk '/header\.h/{x=1} 
        /x()/{y=1} 
        END {if ((x+y) == 2) {print FILENAME} }' \;