Problem 1a

Write a C++ program called hw_1a.cpp

that prints the value of argc followed by the addresses of each argv argument as well the corresponding (C-style) strings. The program must contain everything needed to compile. The following is an example output:

unix> ./hw_1a This is great

Num args = 4

argv[0] = 0x7fffeb3fb1f8 ./hw_1a

argv[1] = 0x7fffeb3fb200 This

argv[2] = 0x7fffeb3fb208 is

argv[3] = 0x7fffeb3fb210 great

Problem1b

Copy hw_1a.cpp

into a new program called hw_1b.cpp

that computes and prints the length of each

command line argument. See an output example below. Do not use functions from or .

Instead, write your own function int strlen(char*) which is given a pointer to a C-style string, namely, argv[i], and returns the length thereof (number of characters).

Use a pointer to advance through the string.

Use pointer dereferencing to determine when to stop.

Hint: C-style strings are NULL-terminated meaning the last character equals \0; the condition *s==\0 is thus met when the end of the string has been reached.

Hint: See the pointer_handout for a related function that compares two C - style strings.

unix> ./hw_1b I learn so much!

Num args = 5

argv[0] = 0x7fff8b27e098 ./hw_b (strlen=6)

argv[1] = 0x7fff8b27e0a0 I (strlen=1)

argv[2] = 0x7fff8b27e0a8 learn (strlen=5)

argv[3] = 0x7fff8b27e0b0 so (strlen=2)

argv[4] = 0x7fff8b27e0b8 much! (strlen=5)

please help, thank you!