Question

Which of the following function is used to find the first occurrence of a given string in another string?
A.strchr()
B.strrchr()
C.strstr()
D.strnset()

Answer 1

Option c
The function strstr() Finds the first occurrence of a substring in another string
Declaration: char *strstr(const char *s1, const char *s2);

Return Value:
On success, strstr returns a pointer to the element in s1 where s2 begins (points to s2 in s1).
On error (if s2 does not occur in s1), strstr returns null.

Answer 2

C. strstr() is the proper answer.

Explanation for Correct answer:

• The characteristic strstr returns the primary occurrence of a string in any other string. This way that strstr may be used to discover whether or not a string carries any other string.

Explanation for wrong answers :

A. strchr():

• The strchr() characteristic returns a pointer to the primary incidence of c this is transformed to an individual withinside the string. The characteristic returns NULL if the desired individual isn't always found.

B. strrchr():

• The strrchr() characteristic reveals the final incidence of c in string. The finishing null individual is taken into consideration as a part of the string. Return Value.

D. strnset():

• The strnset() feature is a built-in characteristic in C and its sets the primary n characters of a string to a given individual. If n is more than the duration of the string, the duration of a string is utilized in the location of n.

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