Multiple choice c

To copy a string into another, given: char s1[30] = "xyz", s2[20];

  1. s2 = s1;

  2. strcpy(s2,s1);

  3. s2 == s1;

  4. all three are wrong
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In C, strings are arrays and cannot be assigned using the '=' operator. The 'strcpy' function from the string.h library is the standard way to copy the contents of one character array (s1) into another (s2), including the null terminator.

AI explanation

To copy a string into another, you can use the strcpy() function from the string.h library in C.

Let's go through each option to understand why it is correct or incorrect:

Option A) s2 = s1; - This option is incorrect because it assigns the memory address of s1 to s2, rather than copying the contents of s1 into s2.

Option B) strcpy(s2, s1); - This option is correct. The strcpy() function is used to copy the contents of one string (s1) into another string (s2). It takes two arguments: the destination string (s2) and the source string (s1).

Option C) s2 == s1; - This option is incorrect. The == operator is used to compare the memory addresses of two variables, not their contents.

Option D) all three are wrong - This option is incorrect because option B is correct.

Therefore, the correct answer is B) strcpy(s2, s1);. This option correctly copies the contents of s1 into s2 using the strcpy() function.

Keep practicing — related questions