compiler

Control Structures The C Language – Part 3  Loop constructs in C ◦ for loops ◦ while loops ◦ do while loops ◦ break and continue  Conditional statements in C ◦ if ◦ switch-case  Boolean issues  The comma operator  Enumerated data types for (expression1; expression2; expression3) { statement(s); } while

Comma splices  Binary to Decimal  Unsigned = simple binary = B2U ◦ 0101 = 5, 1111 = F, 1110 = E, 1001 = 9  Signed = two’s complement = B2T ◦ 0 101 = positive number; same as B2U = 5 ◦ 1 111 = -1*23 + 7 = -8 + 7

Variable types The C Language – Part 1 Required Reading: Computer Systems: A Programmer’s Perspective, 3rd Edition, Chapter 1 thru Section 1.3 Chapter 2 thru Section 2.1.2 % gcc –o hello hello.c Source code Assembly Code Libraries Object Code Executable Code % hello [executes the program] Preprocessor Compiler Assembler Link Editor hello.c hello Type in

Function Pointers CSE 2421 Recommended Reading: Pointers On C, Chapter 13, Sections 13.2 through 13.3 Section 13.3.1 will be especially interesting to anyone who plans to complete Lab 3 1  We saw pointers to simple types before, e.g.: int *ptr1; float *ptr2; char *ptr3;  We also saw examples of pointers to pointers (these