Index of a Value

Write a function int indexOf(const array<int, 6>& a, int x) that returns the index (0 to 5) of the first element equal to x, or -1 if x does not appear in the array. If x appears more than once, return the smallest index.

For {4, 8, 15, 16, 23, 42} and x = 15 the function returns 2. Each test prints the returned indexes on their own lines, as shown in Expected Output.

Do NOT write a main function.

Expected Output:

2↵
-1↵
1↵
-1↵

= newline. The output ends with a newline — print one after the last line.

Hints4 available

Topics:

STL Containersstd::array

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