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C Programming Fundamentals

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1 C Programming Fundamentals C is a compiled language. The user creates source code (often ... exe extension). Below is typical C program called LED.C that illustrates some fundamental C ...

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1 C Programming Fundamentals C is a compiled language. The user creates source code (often with the extension .c) in C syntax. The user then compiles the source code and an object file (normally has an .obj extension) is generated if there are no syntax errors.  The compiler then proceeds to link the object file or files which creates the final executable file (often with the .exe extension). Below is typical C program called LED.C that illustrates some fundamental C syntax: printf Function printf is used to write output to the monitor.  Text contained between starting and ending quotation marks are sent verbatim to the monitor.  Control characters, also added to format output.  For example, , is used to generate carriage return. /* FILENAME: LED.C   AUTHOR:   PAUL OH   DATE:     10/02/00   NOTES:    USER ENTERS DECIMAL NUMBER, 8255 LIGHTS LED */ #include<stdio.h> #include<stdlib. h> void main(void) {  int i;  int controlWord, portA, baseAddress;  int myNumber;  baseAddress = 608;  portA = baseAddress;  controlWord = baseAddress + 3;  outportb(controlWord, 128);  printf("Enter decimal number between 0 and 255 or 999 to exit: ");  scanf("%d", &myNumber);  while(myNumber != 999)  {     if(myNumber == 999)     {       printf ("Exiting Program ");       exit(0 );     }     outportb(portA,  myNumber);     printf("Enter decimal number between 0 and 255 or 999 to exit: ");     scanf("%d", &myNumber);  } } Comment lines begin with /* and end with */  and are ignored by the compiler Header files have an .h extension. These are 2 must be includ ...

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