3.8 Chapter Summary 85 and display the sum. Run the program several times with different data. Trace execution using the debugger. 2. The instruction sub eax, label will subtract the doubleword at label from the doubleword already in the EAX register. Starting with the windows64 project, modify the example program given in this section to prompt for and input two numbers, subtract the second number from the first, and finally, display the result. Run the program several times with different data. Trace execution using the debugger. 3.8 Chapter Summary This chapter introduced 80x86 assembly language as translated by the Visual Studio 2008 assembler. Assembly language comments start with a semicolon. Other state- ments have the format