One useful feature of preprocessor symbols is macros. A macro has parameters and the preprocessor will ensure that the search and replace will replace a symbol in the macro with the symbol used as a parameter to the macro.
Edit the main function to look as follows:
#include <iostream> #define MESSAGE(c, v) for(int i = 1; i < c; ++i) std::cout << v[i] << std::endl; int main(int argc, char *argv[]) { MESSAGE(argc, argv); std::cout << "invoked with " << argv[0] << std::endl; }
The main function calls a macro called MESSAGE and passes the command line parameters to it. The function then prints the first command line parameters (the invocation command) to the console. MESSAGE is not a function, it is a macro, which means ...
