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Unformatted text preview: – Functions
• All C programs are made up of components (modules) called functions. Each program contains a number of functions, one of which is called main. • C contains libraries of prewritten functions, and also allows users to write their own functions. • When using library functions, a statement telling C to use the library must be included in the header
– Example: #include <math.h> • Many mathematical functions are available in the C math library. Math Library Functions
• Math library functions
– Perform common mathematical calculations (sin, exponent, absolute value, etc.) – Include in header: #include <math.h> • Format for calling functions
– FunctionName( argument1 , argument2, … ); – Arguments may be constants, variables, or expressions – i = sqrt( 25.0 );
• sqrt is a function that accepts 1 argument of data type double • sqrt calculates the square root of the argument (in this case 25.0) • All math functions...
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This note was uploaded on 08/06/2010 for the course ENGR 3 taught by Professor Ben-yaakov during the Summer '08 term at UCSB.
- Summer '08