Program 1 #include <iostream> #include <string> using namespace std; int main()

Question

Program 1

#include <iostream>

#include <string>

using namespace std;

int main()

{

       int size;

       //Section 1 - Array Definitions

       int readings[-1];

       float measurements[4.5];

       string names[size];

       //Section 2

       const int SIZE = 100;

       int numbers[SIZE];

       for (int i = 1; i <= SIZE; i++)

              numbers[i] = i;

}

Questions:
1) In the lines under the comment labeled Section 1, what is incorrect about these variable declarations? Rewrite the lines so that they are valid C++ statements that will compile.







2) Under Section 2, is there a problem with these lines of code? If so, how do you fix them?

Explanation / Answer

1)

int size;          // The declaration is correct

//Section 1 - Array Definitions

int readings[-1]; // The declaration is wrong because size of the array cannot be negative
float measurements[4.5]; // size of the array must be integer
string names[size]; // Size of the array must be a constant

Correct Code :

       //Section 1 - Array Definitions

       int readings[4];

       float measurements[4];

       string names[5];

2)

const int SIZE = 100;

       int numbers[SIZE];

       for (int i = 1; i <= SIZE; i++)
       {

        numbers[i] = i;
       }

The above code is correct.

Correct program :

#include <iostream>

#include <string>

using namespace std;

int main()

{

       int size;

       //Section 1 - Array Definitions

       int readings[4];

       float measurements[4];

       string names[5];

       //Section 2

       const int SIZE = 100;

       int numbers[SIZE];

       for (int i = 1; i <= SIZE; i++)
       {

        numbers[i] = i;
       }
}

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