Question

Write in C Program....

Write a multi-threaded program that calculates various statistical values for a list of numbers. This program will be passed a series of numbers on the command line and will then create three separate worker threads.

One thread will determine the average of the numbers, the second will determine the maximum value, and the third will determine the minimum value. For example, suppose your program is passed the integers 90 81 78 95 79 72 85. The program will report

The average value is 82

The minimum value is 72

The maximum value is 95

The variables representing the average, minimum, and maximum values will be stored globally. The worker threads will set these values, and the parent thread will output the values once the workers have exited.

Answer 1

Note:

• main.c file
• command line arguement are passed by the user in snippet 1
• global variables created
• three threads are created
• output is below the code

main.c

/*
Write a program in c multi-threaded program that calculates various statistical
values for a list of numbers. This program will be passed a series
of numbers on the command line and will then create
three separate worker threads.
*/
#include<stdio.h>
#include<stdlib.h>
#include<pthread.h>


int arr[50], i;
int n;


/*
 average, minimum, and maximum 
 values will be stored globally
*/
float average;
int minimum;
int maximum;

//thread1 for calculating average
void *th()
{
        int sum=0;
        for(i=1;i<=n;i++)
                sum=sum+arr[i];
        average=sum/n;
        
}
//thread2 for calculating minimum value
void *th1()
{


        minimum=arr[1];
        for(int i=1;i<n;i++)
                if(minimum>arr[i])
                minimum=arr[i];
        

}
//thread3 for calculating maximum value
void *th2()
{

        maximum=arr[1];
        for(int i=1;i<=n;i++)
                if(maximum<arr[i])
                        maximum=arr[i];
                        
}
int main(int argc, char *argv[])
{
    int count =0;
    /*
     a series of numbers on the command line is passing 
    */
        for (int i = 1; i < argc; i++)
        {
                arr[i] =  atoi(argv[i]);
                count++;
        }
        n = count;
        printf("%d command line arguement are passed \n", count);
        for(int i=1; i<=n; i++)
            printf("%d\t",arr[i]);
            
            
        printf("\n\n");
    int t,i;
    //three objectof worker threads are t1 ,t2 and t3
    pthread_t t1;
    pthread_t t2;
    pthread_t t3;
    
    //creating threads
        t=pthread_create(&t1,NULL,&th,NULL);
        pthread_join(t1,NULL);
    
        t=pthread_create(&t2,NULL,&th1,NULL);
        pthread_join(t2,NULL);

        t=pthread_create(&t3,NULL,&th2,NULL);
        pthread_join(t3,NULL);
        
        
    /*main is the parent thread.
    the parent thread will output the values
    once the workers have exited.
    */
    printf("The average value is %f",average);
    printf("\nThe Minimum  value is %d",minimum);
    printf("\nThe Maximum  value is %d",maximum);
        
return 0;

}

OUTPUT:

command line arguements:

c Chegg х Online C Compiler - online editor X + C onlinegdb.com/online_c_compiler# input OnlineGDB beta Command line arguments 90 81 78 95 79 72 85 online compiler and debugger for c/c++ code. compile.run. debug. share. Standard Input: O Interactive Console O Text OX IDE PRINT RECIPE 1. Click "Print Recipe" 2. Add Extension 3. Enjoy! My Projects Classroom new Learn Programming Programming Questions Sign Up Login fy + 41.6K GOT AN OPINION? SHARE AND GET REWARDED. Rakuten AIP Have fun taking surveys and get paid! ADS VIA CARBON About - FAQ - Blog - Terms of Use . Contact Us • GDB Tutorial - Credits . Privacy © 2016 - 2020 GDB Online

After insert the command line arguements :

C Chegg Online C Compiler - online editor X + c onlinegdb.com/online_c_compiler# 7 command line arguement are passed 90 81 78 95 79 72 85 The average value is 82.000000 The Minimum value is 72 The Maximum value is 95 ... Program finished with exit code 0 Press ENTER to exit console.