Please use C$++$langague$,$Please do $$not motify the code, just fix totalsum

make the result Correctly.

#include

#include "pthread.h$"$

#include

#include

using namespace std;

$//$ to protect the C$.$S

pthread$\_$mutex$\_$t Count$\_$mutex $=$ PTHREAD$\_$MUTEX$\_$INITIALIZER;

double total$\_$sum $=0\mathrm{.}0$;

$//$ function to calculate

double factorail$($int num$)\{$

double fact $=1\mathrm{.}0$;

for$($int i $=1$; i$<=$ num; $++$i$)\{$

fact $*=$i;

$//$cout $<<$ "Factorial$("<<$ i $<<")=$"end; $++$i$)\{$

part$\_$sum $+=1\mathrm{.}0/$factorail$($i$)$;

$\}$

pthread$\_$mutex$\_$lock$($&Count$\_$mutex$)$;

total$\_$sum $+=$ part$\_$sum;

pthread$\_$mutex$\_$unlock$($&Count$\_$mutex$)$;

return nullptr;

$\}$

int main$()\{$

$//$ get the num from user

int n;

cout $<<$ "Enter the value of n $($max number in the series$)$: $"$;

cin $>>$ n;

$//$ divide it$,$ so it's works between $2$ threads

int mid $=$ n $/2$;

$//$ Create $2$ threads

ThreadArgs$*$ arg$1=$ new ThreadArgs$\{1,$mid$\}$;

ThreadArgs$*$ arg$2=$ new ThreadArgs$\{$mid$+1,$n$\}$;

pthread$\_$t tid$1,$tid$2$;

pthread$\_$create$($&tid$1,$nullptr,series,arg$1)$;

pthread$\_$create$($&tid$2,$nullptr,series,arg$2)$;

pthread$\_$join$($tid$1,$nullptr$)$;

pthread$\_$join$($tid$2,$nullptr$)$;

$//$ Print the sequence and total result

cout $<<$ "Sequence: $"$;

for $($int i $=1$; i $<=$ n; $++$i$)\{$

cout $<<"1/"<<$ i $<<"!"$;

if $($i $!=$ n$)$ cout $<<"+"$;

$\}$

cout $<<$ endl;

cout $<<$ "Total Result: $"<<$ total$\_$sum $<<$ endl;

$$return$0$;

$\}$