sytem() error please help!

i want to run a python file with a certain program and what i got told does'nt work this is what i got:

system("pythonw.exe myfile.py")

but it just comes up with this error

mingw32-g++.exe -Wall -fexceptions  -g     -c "E:\Raftech\C++\C++ Projects\EXE Program\main.cpp" -o obj\Debug\main.o
E:\Raftech\C++\C++ Projects\EXE Program\main.cpp:1:7: error: expected constructor, destructor, or type conversion before '(' token
Process terminated with status 1 (0 minutes, 0 seconds)
1 errors, 0 warnings (0 minutes, 0 seconds)

pleas help me
thanks in advance