Beginning C for Arduino by Jack Purdum

Author:Jack Purdum
Language: eng
Format: epub
Publisher: Apress®
Published: 2012-12-07T16:00:00+00:00

Figure 7-1. Statement block scope for temp.

In Figure 7-1, the shaded area defines the statement block scope for variable temp and extends from the end of the statement that defines temp to the closing brace of the if statement block. Variable temp may be used anywhere within the shaded area because it is “in scope.” Anywhere outside that shaded area, however, variable temp doesn't even exist. Outside the shared area in Figure 7-1, variable temp is no longer in the symbol table...it is out of scope...it is invisible...it is dead. As such, trying to use temp several lines after it has gone out of scope must draw an error message from the compiler—which it did.

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