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lect2 - DS CS 11002 9 Computer Sc Engg IIT Kharagpur 6 1...

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PDS: CS 11002 Computer Sc & Engg: IIT Kharagpur 1 & $ % Structure of a C Program A program in C language is a collection of functions and declarations . It also have C preprocessor (cpp) directives. A function named ‘ main() ’ is mandatory. Lect 2 Goutam Biswas
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PDS: CS 11002 Computer Sc & Engg: IIT Kharagpur 2 & $ % C Function A function definition in C language has a name, a list of formal parameters (optional), type of the value it returns (if any), local variable declarations (if any), and a sequence of statements a . a There may be comments for better human understanding. Lect 2 Goutam Biswas
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PDS: CS 11002 Computer Sc & Engg: IIT Kharagpur 3 & $ % An Example with Three Functions Lect 2 Goutam Biswas
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PDS: CS 11002 Computer Sc & Engg: IIT Kharagpur 4 & $ % #include <stdio.h> // cpp directive int gcd(int, int); // Func Interface int sum(int small, int large) // Def { int i, total = 0; if(small > large){ int temp=small; small=large; large=temp; } for(i=small;i<=large;++i) total += i; return total; } // Def ends Lect 2 Goutam Biswas
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PDS: CS 11002 Computer Sc & Engg: IIT Kharagpur
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