Longest Line

Write a function string longestLine(const string& filename) that returns the line of the file with the most characters. If several lines tie for the longest, return the one that appears first in the file. For a file containing:

kiwi
strawberry
fig

the function returns strawberry.

The test prints the returned line on its own line, for example (see Expected Output).

Do NOT write a main function.

Expected Output:

strawberry↵
apple↵

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

Hints4 available

Topics:

Streamsifstream

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