This program illustrates the member functions
reserve() and resize() for vector objects.
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To begin we have, for v1:
Size = 0  Capacity = 0
Contents:
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After v1.reserve(6) we have, for v1:
Size = 0  Capacity = 6
Contents:
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After v1.resize(4) we have, for v1:
Size = 4  Capacity = 6
Contents: 0 0 0 0
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To begin we have, for v2:
Size = 10  Capacity = 10
Contents: 3 3 3 3 3 3 3 3 3 3
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After v2.reserve(6) we have, for v2:
Size = 10  Capacity = 10
Contents: 3 3 3 3 3 3 3 3 3 3
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After v2.reserve(16) we have, for v2:
Size = 10  Capacity = 16
Contents: 3 3 3 3 3 3 3 3 3 3
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After v2.resize(8) we have, for v2:
Size = 8  Capacity = 16
Contents: 3 3 3 3 3 3 3 3
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After v2.resize(12) we have, for v2:
Size = 12  Capacity = 16
Contents: 3 3 3 3 3 3 3 3 0 0 0 0
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After v2.resize(6, -1) we have, for v2:
Size = 6  Capacity = 16
Contents: 3 3 3 3 3 3
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After v2.resize(10, -1) we have, for v2:
Size = 10  Capacity = 16
Contents: 3 3 3 3 3 3 -1 -1 -1 -1
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After v2.resize(20, -2) we have, for v2:
Size = 20  Capacity = 24
Contents: 3 3 3 3 3 3 -1 -1 -1 -1 -2 -2 -2 -2 -2 -2 -2 -2 -2 -2
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