chapter_5_beginning_javabook

To explain this strange behavior of the program we

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Unformatted text preview: 2,147,483,648. To explain this strange behavior of the program, we must remember that the memories of computers can contain only non-negative binary numbers. Negative numbers are represented so that some positive values stored in memory are considered as negative numbers. For example, the value 2,147,483,648 is treated as -2,147,483,648. The values that can be contained in 4-byte int variables have the following meanings: VALUE IN MEMORY MEANING IN PROGRAM 2,147,483,648 2,147,483,649 2,147,483,650 . . 4,294,967,294 4,294,967,295 0 1 . . 2,147,483,646 2,147,483,647 -2,147,483,648 -2,147,483,647 -2,147,483,646 . . -2 -1 0 1 . . 2,147,483,646 2,147,483,647 (80000000H) (80000001H) (80000002H) (FFFFFFFEH) (FFFFFFFFH) (7FFFFFFEH) (7FFFFFFFH) Figure 5-1 shows how the variables of program Game.java look like in the main memory of a computer, and how the values of the variables change when the program is executed with input value 1234. A variable declaration like int integer_from_keyboard ; reserves four bytes from contiguous memory locations somewhere in the main m...
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