Find the sum of all the numbers of the input vector
Find the sum of the elements in the "second" diagonal
Divide elements by sum of elements
Approximate functions 2 (★★★★)
Back to basics: throwing errors / exceptions
"Percentages may not total 100 due to rounding"
Comparison of floating-point numbers (doubles)
Add all the numbers between two limits (inclusive)
Anyone for tennis? Your chances of winning a tie-break game
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