# (Solved Homework): Write a function that receives an array of float numbers and its and then it computes and returns the sum of

Write a function that receives an array of float numbers and its and then it computes and returns the sum of the array elements. The function prototype is: float arraySun(float x[], int size); b) Write a function that receives two arrays of float numbers and their size, and then it uses the arraySum() function to compute the deviations from the mean for the first array and stores them in the second array. The function prototype is: void get Deviations(float x[], float deviations[], int size); c) Write a C++ program in which you do the following: 1. Initialize a static arrays p[] with the data in the following table: 2. Create a dynamic float array called pdeviations which has the same number of elements as the array p. 3. Using the getDeviations() function, store the deviations of p in the array pdeviations. 4. Display the values of array p and its deviations side by side and properly labeled, as in: 5. Also display the sum of pdeviations. 6. Add your source file and output screen to the word document.

a)

/* Function arraySum*/
float arraySum(float x[], int size)
{
/* declaring necessary variables*/
int i;
float sum=0.0;
/* calculating the sum of the array elements & storing them in variable sum*/
for(i=0;i<size;i++)
{
sum=sum+x[i];
}
return sum;   /*returns the result*/
}

b) /*Function getDeviations*/

void getDeviations(float x[], float deviations[], int size)
{
/* declaring necessary variables*/
float sumOfArray,average;
int i;
/* calculating sum of array using arraySum function*/
sumOfArray=arraySum(x,size);

/* calculating average value of the array elements*/
average=(float)sumOfArray/size;

/* calculating deviations i.e. the difference between the array elements and the average value of the array elements*/
for(i=0;i<size;i++)
{
deviations[i]=x[i]-average;
}
}

c) /* The Full Program in C++*/

#include<iostream>
#include<iomanip>

using namespace std;

float arraySum(float x[], int size);
void getDeviations(float x[], float deviations[], int size);

int main()
{
/* 1.declaring a static array p[] and initialize it accordingly */
static float p[]={-10.3,1.5,11.1,15.7,-0.4,25.2};

/* declaring necessary variables*/
int size=6;   /* the size of the array p[] is 6 */
int i;
float sumDeviations;
/* 2.creating a dynamic array pdeviations with the same number of elements of array p[] */

float *pdeviations;
pdeviations=new float[size];   /* the size of the array p[] is 6 */
/**3.using getDeviations() function storing the deviation in pdeviation**/
getDeviations(p,pdeviations,size);

/* 4.displaying the values of array p and its deviations side by side */
cout<<“p_value”<<”   “<<“p_deviation”<<endl;
for(i=0;i<size;i++)
{
cout<<p[i]<<”   “<<pdeviations[i]<<endl;
}

/* calculating the sum of the array pdeviations using arraySum() function & storing the result in variable sumDeviation*/
sumDeviations=arraySum(pdeviations,size);

/* 5.displaying the sum of pdeviations array*/
cout<<“nThe sum of pdeviations array is (without setting the precision):”;
cout<<sumDeviations<<endl;
cout<<“nThe sum of pdeviations array is (setting the precision):”;
cout<<fixed<<setprecision(12)<<sumDeviations<<endl;

delete[] pdeviations;   /* it releases the memory that was dynamically allocated for array elements*/
return 0;
}

float arraySum(float x[], int size)
{
/* declaring necessary variables*/
int i;
float sum=0.0;
/* calculating the sum of the array elements & storing them in variable sum*/
for(i=0;i<size;i++)
{
sum=sum+x[i];
}
return sum;   /*returns the result*/
}

void getDeviations(float x[], float deviations[], int size)
{
/* declaring necessary variables*/
float sumOfArray,average;
int i;
/* calculating sum of array using arraySum() function*/
sumOfArray=arraySum(x,size);

/* calculating average value of the array elements*/
average=(float)sumOfArray/size;

/* calculating deviations i.e. the difference between the array elements and the average value of the array elements*/
for(i=0;i<size;i++)
{
deviations[i]=x[i]-average;
}
}

/*———————–6.——————–output screen———————————————-*/

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