GATE-CS-2016 (Set 1) - Question 45

The question number 45 from the GATE-CS-2016 (Set 1) paper pertains to programming and is as follows:

Given the following declarations in C:

struct node {
    int i;
    float j;
    };
struct node *s[10];

Which one of the following is correct in reference to the above declarations?

(a) s is a pointer to an array of 10 structures (b) s is an array of 10 structures, each of which is a pointer to an int and a float (c) s is an array of 10 pointers to structures, each of which has an int member and a float member (d) s is an array of 10 pointers to structures, each of which points to an int and a float

The correct answer is (c).

Explanation

The above C code declares a structure node which has two members, an integer i and a float j. It then declares an array s of 10 pointers to structures of type node.

Option (a) is incorrect because s is not a pointer to an array of structures, but is instead an array of pointers to structures.

Option (b) is incorrect because it suggests that each structure in the array s is a pointer to an int and a float. This is not the case - each element of the array s is a pointer to a structure of type node, which contains an int and a float.

Option (c) is correct because it correctly characterizes s as an array of pointers to structures, where each structure has a member i of type int and a member j of type float.

Option (d) is incorrect because it suggests that each element of the array s points to an int and a float - this is not the case, as each element of s is a pointer to a structure of type node, which contains an int and a float.

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# GATE-CS-2016 (Set 1) - Question 45

The question number 45 from the GATE-CS-2016 (Set 1) paper pertains to programming and is as follows:

Given the following declarations in C:

struct node { int i; float j; }; struct node *s[10];

Which one of the following is correct in reference to the above declarations?

(a) s is a pointer to an array of 10 structures
(b) s is an array of 10 structures, each of which is a pointer to an int and a float
(c) s is an array of 10 pointers to structures, each of which has an int member and a float member
(d) s is an array of 10 pointers to structures, each of which points to an int and a float

The correct answer is (c).

### Explanation

The above C code declares a structure `node` which has two members, an integer `i` and a float `j`. It then declares an array `s` of 10 pointers to structures of type `node`. 

Option (a) is incorrect because `s` is not a pointer to an array of structures, but is instead an array of pointers to structures.

Option (b) is incorrect because it suggests that each structure in the array `s` is a pointer to an int and a float. This is not the case - each *element* of the array `s` is a pointer to a structure of type `node`, which contains an int and a float.

Option (c) is correct because it correctly characterizes `s` as an array of pointers to structures, where each structure has a member `i` of type int and a member `j` of type float.

Option (d) is incorrect because it suggests that each element of the array `s` points to an int and a float - this is not the case, as each element of `s` is a pointer to a structure of type `node`, which contains an int and a float.