This program illustrates push_back() for putting values into a vector, and
contrasts the capacity of a vector with its size. It also permits you to
observe your C++ implementation's algorithms for reallocation. Values are
added one at a time, and the size and capacity are both displayed after each
value is added by calls to the size() and capacity() member functions.
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Enter starting size for vector: 0
Enter number of values to add: 30

Size of vector to start:     0
Capacity of vector to start: 0
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Current vector size:     1
Current vector capacity: 1
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Current vector size:     2
Current vector capacity: 2
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Current vector size:     3
Current vector capacity: 3
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Current vector size:     4
Current vector capacity: 4
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Current vector size:     5
Current vector capacity: 6
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Current vector size:     6
Current vector capacity: 6
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Current vector size:     7
Current vector capacity: 9
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Current vector size:     8
Current vector capacity: 9
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Current vector size:     9
Current vector capacity: 9
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Current vector size:     10
Current vector capacity: 13
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Current vector size:     11
Current vector capacity: 13
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Current vector size:     12
Current vector capacity: 13
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Current vector size:     13
Current vector capacity: 13
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Current vector size:     14
Current vector capacity: 19
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Current vector size:     15
Current vector capacity: 19
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Current vector size:     16
Current vector capacity: 19
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Current vector size:     17
Current vector capacity: 19
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Current vector size:     18
Current vector capacity: 19
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Current vector size:     19
Current vector capacity: 19
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Current vector size:     20
Current vector capacity: 28
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Current vector size:     21
Current vector capacity: 28
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Current vector size:     22
Current vector capacity: 28
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Current vector size:     23
Current vector capacity: 28
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Current vector size:     24
Current vector capacity: 28
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Current vector size:     25
Current vector capacity: 28
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Current vector size:     26
Current vector capacity: 28
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Current vector size:     27
Current vector capacity: 28
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Current vector size:     28
Current vector capacity: 28
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Current vector size:     29
Current vector capacity: 42
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Current vector size:     30
Current vector capacity: 42
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