C++   How to Program (Early Objects Version)
C++ How to Program (Early Objects Version)
10th Edition
ISBN: 9780134448824
Author: Paul Deitel; Harvey M. Deitel
Publisher: Pearson Education (US)
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Chapter 4, Problem 4.28E

(Printing the Decimal Equivalent of a Binary Number) Input an integer containing only 0s and 1s (i.e., a "binary" integer) and print its decimal equivalent. Use the remainder and division operators to pick off the "binary" number's digits one at a time from right to left. Much as in the decimal number system, where the rightmost digit has a positional value of 1, the digit left has apositional value of 10, then 100, then 1000, and so on, in the binary number system the rightmost digit has a positional value of l, the next digit left has a positional value of 2, then 4, then 8, and so on. Thus the decimal number 234 can be interpreted as2*100 + 3 *10 + 4 * 1. The decimal equivalent of the binary 1101 is 1 * 1 + 0 * 2 + 1 * 4 +1 *8 or 1 + 0 + 4 + 8, or 13. [Note: To learn more about binary numbers, refer to Appendix D.)

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C++ How to Program (Early Objects Version)

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