The %c modifier is typically used in case of character, in case you want to fetch just a single character.

%s is used to fetch a string or group of characters Lets for the sake of ease of understanding, We take 2 string of character type arrays.

One of the array of string type char str[] will hold the original string.

The second array which hold the substring which the user input to check from their end if the substring exists or not.

Also lets declare a flag variable "found" of type int as boolean types are not part of C.

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