Table of Content

Character Array MCQ 5 : Constant Expression as String Size

What is the Output of the Following Program ?

#include<stdio.h>
void main()
{
char arr[5*2/2] = {'a','b','c','d','e'};
printf("%c",arr[3]);
}

Options :

1. Constant Expression Not Allowed
2. Bound Error
3. c
4. d

Output:

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How and Why ?

char a[5*2/2];

• Character Array Size Is Always Constant.
• Constant Expression is Allowed as Size of Character Array.
• So Following Statements are Legal as -

char a[5*2/2];
char a[5*2*2];
char a[5+2/2];
char a[5*2^2];
char a[5-2/2];

• Also #define is Allowed -

#define MAX 100
void main()
{
char a[MAX];   // It is Also Allowed
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}