Problem

(Check substrings) Write the following function to check whether string s1 is a substring...

(Check substrings) Write the following function to check whether string s1 is a substring of string s2. The function returns the first index in s2 if there is a match. Otherwise, return −1.

int indexOf(const string& s1, const string& s2)

Write a test program that reads two strings and checks whether the first string is a substring of the second string. Here is a sample run of the program:

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Solutions For Problems in Chapter 6

46PE
47PE

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