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C++ program for taylor series

04/10/2021 Client: muhammad11 Deadline: 2 Day

*Write a parallel program pie.c in C or C++ (pie.cc) for Linux that computes an approximation of the number π using a series with N+1 terms.*

--The series sum is partitioned in T non-overlapping partial sums, each computed by T separate child processes created with the fork() library function.*

--This program demonstrates data parallelism and interprocess communication using pipes. Each child process could perform a (potentially) long computation on a separate CPU (or core). Depending on the computer architecture, the entire computation could reach a speedup close to T.

--Numbers N and T are passed from the shell to the pie program as command line parameters. The main(argc, argv[]) function call gets these parameters (T, N) in argv[1] and argv[2] as strings, respectively. (Element argv[0] contains the program name and we don’t need it.) The first parameter, N, is the upper limit for i in the formula above. The second parameter, T, is the number of child processes that compute partial sums. N should always be greater than T, N>T. Otherwise the program should display an error message and call exit(1).

Use the Nilakantha approximation formula for π: π = 3 + 4/(2*3*4) – 4/(4*5*6) + 4/(6*7*8) - 4/(8*9*10) + …. + k*4/((2*i)* (2*i+1)*( 2*i+2))+... where k = 1 if i is odd and k = -1 if i is even and i goes from 1 to N. The program can be run like this from the shell: ./pie N T .... For instance, ./pie 100 4 This command computes the approximation with 101 terms (starting with term 3) with 4 child processes.

--The parent process iterates with an index variable of type int called j from 0 to T (0≤j

--After ending the loop (above) that created the T child processes, the parent process starts a new loop, with index j from 0 to T (0≤j

--After the second loop ends, the parent process: 1. displays the sum approximating the value of π stored in the accumulator, with a message that reads like: The approximation of pi with N=%d and T=%d processes is %f. (this is a C printf format string, make sure the code displays the actual numbers!) 2. waits for all child processes to end, 3. exits with code 0.

--The child process with index j runs its code in a function called computePartialSum. In this function the child process does this: 1. closes any unnecessary file descriptors (which ones?), 2. reads the values for N,T, and j from the pipe that were written by the parent process, 3. computes the partial sum of the series (as described below), 4. writes the partial sum to the pipe, 5. calls exit(0).

--The child process should NOT rely on global variables to access N, T, and j. These values must be read from the parent process using a pipe. Doing otherwise is considered a mistake.

--For example, if the user runs command ./pie 100 4 then: child process #0 computes the partial sum for i going from 1 to 25, child process #1 computes the partial sum for i going from 26 to 50, child process #2 computes the partial sum for i going from 51 to 75, child process #3 computes the partial sum for i going from 76 to 100

1: A child process with index j (with 0≤j

2: Check for errors when making library such as, fork(), pipe(), etc.

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