This program illustrates the comparison of maps using the relational operators.
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We begin by creating three maps.
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Here are the pairs in the first map:
A 65
B 66
C 67
D 68
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Here are the pairs in the second map:
A 65
B 66
C 67
D 68
E 69
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The contents of the third map are the same as the second.
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Now we perform and show the results of some map comparisons.
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m1 < m2  = true
m1 <= m2 = true
m1 > m2  = false
m1 >= m2 = false
m2 == m3 = true
m2 != m3 = false
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