Hello all
is there somewhere in the web site that gives tips and howto's
on compiling cpp code with the help of vi and gcc ?
and gdb for debugging

vi is a text editor
gcc is a compiler
gdb is a debugger

You write code with a text editor
You compile code with a compiler
You test and debug code with a debugger

start with putting the following an a file called "hello.cpp"

#include <stdio.h>
int main(int argc,char **argv) 
{
    printf("Hello World\n");
    return 0;
}

all: hello

hello.o: hello.c
     $(CXX) $(CXXFLAGS) -g -c hello.c -o $@

hello: hello.o
     $(CXX) $(CXXFLAGS) -g hello.o -o $@