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Structure of a Simple C program<#include directive> <#define directive> main() { <variable declaration section> Statements … } A. #include directive – "contains information needed by the program to ensure the correct operation of Turbo C’s standard library functions”
B. #define directive – "used to shorten the keywords in the program”
C. Variable declaration section – "it is the place where you declare your variable” D. Body of the program – " start by typing main() and the { and } (open and close braces). All statements should be written inside the { and } braces” NOTE: Turbo C is a case sensitive program, therefore use lowercase letters only. Commonly used include files in C language 1. alloc.h – declares memory management functions 2. conio.h – declares various functions used in calling IBM-PC ROM BIOS 3. ctype.h – contains information used by the classification and character conversion macros. 4. math.h – declares prototype for the math functions. 5. stdio.h – defines types and macros needed for standard I/O. 6. string.h – declares several string manipulation and memory manipulation routines. |
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