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Review Questions

If an array has a 100 elements what is the allowable range of subscripts?
What is the difference between the expressions a4 and a[4]?
Write a declaration for a 100 element array of floats. Include an initialisation of the first four elements to 1.0, 2.0, 3.0 and 4.0.
An array day is declared as follows:
```
int day[] = {mon, tue, wed, thu, fri};
```
How many elements has the array day? If the declaration is changed to
```
int day[7] = {mon, tue, wed, thu, fri};
```
how many elements does day have?

What would be output by the following section of C++?

int A[5] = {1 , 2, 3, 4};
int i;
for (i=0; i<5; i++)
 {
  A[i] = 2*A[i];
  cout << A[i] << "  ";
 }

What is wrong with the following section of program?

int A[10], i;
for (i=1; i<=10; i++)
   cin >> A[i];

Write a function heading for a function which will double the first n elements of an array. If the function was amended so that it would return false if n was larger than the size of the array how should the function heading be written? If the function was to be changed so that a new array was produced each of whose elements were double those of the input array how would the heading be written?

Next: Exercises Up: Arrays Previous: Summary