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DASL 130 – C Programming Course

DASL 130 – C Programming Course. Lecture 3. Switch Statement. switch(case){ label: code break; label2: code break; default: code }. Function Basics. return type name (argument list) return type void (for none) or int, char, double, etc name

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DASL 130 – C Programming Course

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  1. DASL 130 – C Programming Course Lecture 3

  2. Switch Statement switch(case){ label: code break; label2: code break; default: code }

  3. Function Basics • return type name (argument list) • return type • void (for none) or int, char, double, etc • name • starts with a letter, no special characters or keyword like a variable • argument list • int input, double input2, char input3 etc

  4. Function Prototype • Same as function declaration, just no contents • Goes before main int functionName(int input); void main(int input2){ int var = functionName(4.0); } int functionName(int input){ return input*2; }

  5. Pass by Value / Reference • By Value – normal method, does not alter variable contents • By Reference – passes memory location int function(int *refvar){ (*refvar) +=2; }

  6. Recursion • Functions that call themselves • Fibonacci sequence F(n) = F(n-1) + F(n-2) 1 1 1 1 2 1 1 3 3 1 1 4 6 4 1

  7. Math • #include <math.h> • sin(angle); • cos(angle); • log(natural); • log10(base10); • pow(base, exponent); • sqrt(input); • more…

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