Question

C++ Program - Arrays-

Include the following header files in your program:     string, iomanip, iostream
Suggestion: code steps 1 thru 4 then test then add requirement 5, then test, then add 6, then test etc.

Add comments to display assignment //step 1., //step 2. etc. This program is to have no programmer created functions. Just do everything in main and make sure you comment each step so I can grade more easily. Also, this program will be expanded in Chapter 9 to use pointers.

Create a program which has:
1. The following arrays created:
                a. an array of double with 5 elements, dArr
                b. an array of long, lArr, with 7 elements and initialized at the time of creation with the values
                                                100000, 134567, 123456, 9, -234567, -1, 123489
                c. a 2 dimensional array of integer, with 3 rows and 5 columns, iArr.
                d. an array of char with your name initialized in it. Big enough for 30 typable characters, sName.
2. define 3 variables, , cnt1 and cnt2 (short data types) as general purpose counters and a long double total
3. define 1 long variable called highest
4. a for loop to put a random number into each of the elements of the array of double, dArr. Use rand() and seed a random starting point with srand(). Use a for loop to display all of the values in dArr.              
5. another for loop to add up the array of double, dArr, into the variable total
6. one cout to print the total and another cout to print the average of the double array, dArr.
7. a for loop similar to the following for the long array, lArr:
                                for ( cnt1 = 1, highest = lArr[0] ; cnt1 < 7 ; cnt1++ )
                                {
                                                //logic to compare each array element, starting with lArr[1], with highest
                                                //replace highest if the value in lArr[cnt] is higher than the value in variable highest
                                }

8. a cout to print highest as derived in the above code        
9. a for loop to put a random number, each with a value no lower than 1 and no higher than 53, into each element of iArr, the array of integer, seed the random generator with srand( (unsigned) time(NULL)). Only have to run srand once…. Use the modulo operator similar to the way you did with dice rolls in Project 2.
10. a separate loop to print iArr with 3 rows on your screen. Each row has 5 numbers. Use setw to control the width of each column. See Chapter 3 for an example of a program using setw. Print row by row.
11. a loop to print the 2 dimensional array, iArr, so that all 3 numbers in column 0 are printed and then on the next line all 3 numbers in column 1, etc. thru column 4. Print column by column.
12. Use cin.getline( ...... ) to type another name into the variable sName.
13. Print the ascii value of each character in the char array, 1 per line. Use a while loop and look for the '\0' as a signal to end.
14. make the array of char, sName, have the name "Albert Einstein" in it. You must use strcpy_s function.
15. print the ascii value of the 12th character of the string sName

Answer 1

Code -

#include <iostream>
#include <istream>
#include <string>
#include <iomanip>
#include <cstring>
using namespace std;

int main()
{
//variable declare
double dArr[5];
double lArr[7] = {100000, 134567, 123456, 9, -234567, -1, 123489};
int iArr[3][5];
char sName[30] = {'J','o','h','n'};
short cnt1,cnt2;
long double total=0;
long highest;
// 4
int i;
//random number generate and store in dArr
srand(time(0));
for(i = 0 ; i<5 ;i++){
double f = (double)rand() / RAND_MAX;
dArr[i] = 1 + f * (49);
}
//print the dArr
for(i = 0 ; i<5 ;i++){
cout<<dArr[i]<<" ";
}
cout<<endl;
//do total of dArr
for(i = 0 ; i<5 ;i++){
total+=dArr[i];
}
//print the total
cout<<"Total of double array is "<<total<<endl;
//print the average
cout<<"Average of double array is "<<total/5<<endl;
//extract the highest from lArr and
for ( cnt1 = 1, highest = lArr[0] ; cnt1 < 7 ; cnt1++ )
{
//logic to compare each array element, starting with lArr[1], with highest
//replace highest if the value in lArr[cnt] is higher than the value in variable highest
if(highest<lArr[cnt1])
highest = lArr[cnt1];
}
//print the highes value
cout<<"Highest is "<<highest<<endl;
//generate random number in 2d array between 1 to 53
for ( cnt1 = 0 ; cnt1 < 3 ; cnt1++ )
{
for ( cnt2 = 0 ; cnt2 < 5; cnt2++ ){
iArr[cnt1][cnt2] = rand()%(53) + 1;
}
}
cout<<endl;
//print the 2 d array with setw(3)
cout<<"iArr is "<<endl;
for ( cnt1 = 0 ; cnt1 < 3 ; cnt1++ )
{
for ( cnt2 = 0 ; cnt2 < 5; cnt2++ ){
cout<<setw(3)<<iArr[cnt1][cnt2];
}
cout<<endl;
}
cout<<endl;
//print 2d array iArry column wise
cout<<"iArry print in column wise "<<endl;
for ( cnt1 = 0 ; cnt1 < 5 ; cnt1++ )
{
for ( cnt2 = 0 ; cnt2 < 3; cnt2++ ){
cout<<setw(3)<<iArr[cnt2][cnt1];
}
cout<<endl;
}
cout<<endl;
//ask user to eneter name
cout<<"Enter the name "<<endl;
cin.getline(sName,30);
//print the name
cout<<sName<<endl;
cnt1 = 0;
//print the Ascci value of name
while(sName[cnt1]!='\0'){
cout<<sName[cnt1]<<" Ascci is "<<int(sName[cnt1])<<endl;
cnt1++;
}
//copy Albert Einstein to sName array
strcpy(sName,"Albert Einstein");
cout<<sName<<endl;
//print the ascii of 12th character
cout<<"12th character ascii value is "<<int(sName[12]);
  
return 0;
}

Screenshots -

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