DO NOT SUBMIT A C++ PROGRAM, WRITE A CPROGRAM!!!
DO NOT SUBMIT A C++ PROGRAM, WRITE A CPROGRAM!!!
DO NOT SUBMIT A C++ PROGRAM, WRITE A CPROGRAM!!!
DO NOT SUBMIT A C++ PROGRAM, WRITE A CPROGRAM!!!
Do Not Submit A C Program Write A C Program Do Not Submit A C Program Write A C Program Do Not Submit A C 1 (754.14 KiB) Viewed 37 times
(60 pts) From previous homework you are already familiar with the math function f defined on positive integers as f(x)=(3x+1)/2 if x is odd and f(x)=x/2 if x is even. Given any integer var, iteratively applying this function f allows you to produce a list of integers starting from var and ending with 1 . For example, when var is 6 , this list of integers is 6,3,5,8,4,2,1, which has a length of 7 because this list contains 7 integers (call this list the Collatz list for 6). Write a C program A6p3.c that accepts three command line arguments a,b and n which are assumed to be positive integers with a<b and n between 2 and 6 inclusive. Use pthread to create n threads to count how many integers between a and b inclusive have their Collatz list length (A) even; (B) odd. Notice that the integer 6 belongs to category (B). You should divide this list generation and length calculating task among the n threads as evenly as possible. For example, if n is 3 and there are 60 integers between a and b inclusive, then each thread is supposed to handle 60/3=20 Collatz lists. Print out the two numbers representing the counts for (A)(B) mentioned above. Use mutex or semaphore to avoid race conditions if necessary. Note: if you do not use pthread to divide the task among the threads, you will get zero points. A sample run of the compiled program is shown below. [kwang@computer] [ /temp] \$./A6p3 111703 Using 3 threads. The number of integers from 11∼70 whose Coldatz. list length is even is 31 . The number of integers from 11 70 whose Coldatz. list length is odd is 29.
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