Lab 1 - Data Types 1BYU CS 124

Lab 1 – Data Types

"Using C code, determine the size of signed and unsigned char, int, and long integral data types.

Demonstrate the problems of overflow.

Show how fractional numbers are represented in a computer.

Demonstrate problems that arise when using floating point data types."

Lab 1 - Data Types 2BYU CS 124

Lab 1 – Data Types

1. Acquire a Texas Instruments MSP430 LaunchPad Development Tool (R1.5).

Data Types Lab

Change RXD,TXDfrom vertical to

horizontal position.

Lab 1 - Data Types 3BYU CS 124

Lab 1 – Data Types

2. Install (if necessary) and execute TI's Code Composer Studio v5.x.

Data Types Lab

Lab 1 - Data Types 4BYU CS 124

Lab 1 – Data Types

3. Open a Terminal window in CCS

Data Types Lab

Lab 1 - Data Types 5BYU CS 124

Lab 1 – Data Types

4. Compile and execute Lab01.c

Data Types Lab

Lab 1 - Data Types 6BYU CS 124

Lab 1 – Data Types

5. Level of printf/scanf support = full

Data Types Lab

Lab 1 - Data Types 7BYU CS 124

TERMINAL MacrosData Types Lab

To output a string, use:TERMINAL(<string>);

To output a formatted number, use:TERMINAL1(<format string>,<exp>);

To output a formatted number twice, use:TERMINAL2(<string>,<exp>);

To output two different formatted numbers, use:TERMINAL3(<string>,<exp1>,<exp2>);

Examples:TERMINAL("\n\r** INTEGERS **");TERMINAL1("21+2=%d",21+2);TERMINAL2("char=%d (0x%2x)",127);

TERMINAL3("Q4.4=%f (0x%2x)",(((long)32)/16.0), 32;

Lab 1 - Data Types 8BYU CS 124

Lab 1 – Data Types

2 pts Your C program programmatically finds the largest valuesfor signed and unsigned chars, ints, and longs and themost negative values for signed chars, ints, and longs.

2 pts Your C program programmatically demonstrates data typeoverflow for chars, ints, and longs.

2 pts Your C program programmatically finds the largest positiveand most negative signed Q16.16 fixed point numbers.

2 pts Your C program programmatically illustrates floating pointround-off errors and demonstrates why it's a bad idea touse equal comparisons with floating point numbers.(2 examples please.)

2 pts Your C program programmatically demonstrates thatassociate order of arithmetic operations is important.(2 examples please.)

Data Types Lab