Determine whether the following array decalarations are vali

Determine whether the following array decalarations are valid. If a declaration is valid, determine the size of the array.

A) int list[ ] = {18, 13, 14, 16};

B) int x [10] = {1, 7, 5, 3, 2, 8};

C) double y[4] = {2.0, 5.0, 8.0, 11.0, 14.0};

D) double lengths[ ] = {8.2, 3.9, 6.4, 5.7, 7.3};

E) int list [7] = {12, 13, 14, 16, , 8};

F) string names[8] = {\"John\", \"Lisa\", \"Chris\", \"katie\"};

Solution

Answer :

Determine whether the following array decalarations are valid. If a declaration is valid, determine the size of the array.

A) int list[ ] = {18, 13, 14, 16};

Answer :

It is a valid declaration

Size of the array is 4

Explanation :

1.The ArrayList type is int.

2.Initializing with values are

                       list[0]=18

                       list[0]=13

                       list[0]=14

                       list[0]=16

3. The ArrayList contains 4 values,so arraysize is 4.

...........................

C) double y[4] = {2.0, 5.0, 8.0, 11.0, 14.0};

Answer :

It is invalid declaration.

Explanation :

Arraylist size is 4 but we are initializing 5 elements.So,it is invalid declaration.

...........................

D) double lengths[ ] = {8.2, 3.9, 6.4, 5.7, 7.3};

Answer :

It is a valid declaration

Size is 5

Explanation :

1.The ArrayList type is double.

2.Initializing with values are

                       lengths[0]=8.2,

                       lengths[1]=3.9,

                       lengths[2]=6.4,

                       lengths[3]=5.7,

                       lengths[4]=7.3;

3.The ArrayList contains 5 values,so arraysize is 5.

..................................

E) int list [7] = {12, 13, 14, 16, , 8};

Answer :           

It is invalid declaration.

Explanation :

{12, 13, 14, 16, , 8};

In this we are find that double comma (, ,).So it is wrong declaration.

...................