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I am having trouble controlling an array, can anybody please help.

Write a program to take two numerical lists of the same length ended by a

sentinel value and store the lists in array x any y, each of which

has 20 elements. Let n be the actual number of data values in each

list. Store the product of corresponing elements x and y in a third

array, z, also of size 20. Display the arrays x, y, and z in a three-column

table. Then compute and display the square root of the sum of the items

in z.

Analysis

inputs: data type double, int

1.1 n = be the actual number of data

1.2 x & y = ends by sentinel value and stores the list into x and y

1.3 z = display the square root of the sum of items in z

1.4 SIZE is 20

Outputs: x, y, z

2.1 x = 20 elements stored

2.2 y = 20 elements stored

2.3 z = the square root of the sum (20 elements)

Contraints:

3.1 length ended by a sentinal value

Formulas

1. none

2. ...

DESIGN

1. Library:

1.1 stdio.h

1.2 math.h

2. main()

2.1 Sub-step

2.2 ...

3. prompt:

3.1 Prompt the user to input data

3.2 Data table for X, Y, and Z

*/

#define _CRT_SECURE_NO_WARNINGS

#include <stdio.h>

#include <math.h>

#define SENTINEL -99

#define SIZE 1

/* Description: Get counted change

Param(s): 4 output parameters

Return Value: none

*/

int main(void)

{

int n = 0; /* data list */

double arrX[SIZE], /* list of numbers */

arrY[SIZE], /* list of numbers */

sum[SIZE], /* the sum of ArX + ArY */

sum_sqr[SIZE]; /* the square root of the sum */

printf("Enter numbers separated by blanks for X & Y\n");

scanf("%lf %lf", &arrX[n], &arrY[n]);

while (arrX[n] != SENTINEL || arrY[n] != SENTINEL) {

sum[n] = arrX[n] + arrY[n];

printf("Enter numbers by blanks for X & Y\n");

scanf("%lf %lf", &arrX[n], &arrY[n]);

}

/*Get Array n, X, Y, and Z data table */

printf("%2s%10s%10s%10s\n", "n", "X", "Y", "Z");

printf("----------------------------------------\n");

for (n = 0; n < SIZE; ++n)

printf("%2d%11.2lf%10.2lf%11.2lf\n", n, arrX[n], arrY[n], sum_sqr[n]);

return(0);

}