Zoho Coding Quiz 19 | C Debugging Quiz | String Functions

In this quiz, we’re diving into the manipulation of strings in C, focusing on pointer arithmetic, string length, and character assignment.

Step-by-Step Explanation:

strcpy(x, "Zoho"):

Copies the string "Zoho" into the array x. After this, x = ['Z', 'o', 'h', 'o', '\0'].

strlen(x):

Returns the length of the string "Zoho" excluding the null terminator. So, n = 4.

Pointer Arithmetic: *x = *(x + (n - 1)):

x + (n - 1) points to the last character of the string ('o' at index 3).

*x = *(x + 3) replaces the first character 'Z' with the last character 'o'.

Printing: printf("%s", x):

The modified string is now "ooho", and this is what gets printed.

Key Concepts:

String Manipulation:

In C, strings are arrays of characters, and pointers are frequently used to manipulate them.

Pointer arithmetic can be used to access specific elements of a string or array.

strcpy and strlen:

strcpy copies a string into a character array, while strlen calculates the length of the string (excluding the null terminator).

Dereferencing Pointers:

Dereferencing a pointer (e.g., *x) accesses the value stored at the memory location the pointer points to.

Character Assignment:

In this code, we assign the last character of the string to the first character using pointer arithmetic, which demonstrates an important aspect of modifying strings in C.

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