INTERVIEW QUESTIONS C C BASICS DETAILS

Question: What is a pragma?

Answer: The #pragma preprocessor directive allows each compiler to implement compiler-specific features that can be turned on and off with the #pragma statement. For instance, your compiler might support a feature called loop optimization. This feature can be invoked as a command-line option or as a #pragma directive.

To implement this option using the #pragma directive, you would put the following line into your code:

#pragma loop_opt(on)

Conversely, you can turn off loop optimization by inserting the following line into your code:

#pragma loop_opt(off)

The #pragma preprocessor directive allows each compiler to implement compiler-specific features that can be turned on and off with the #pragma statement. For instance, your compiler might support a feature called loop optimization. This feature can be invoked as a command-line option or as a #pragma directive.

To implement this option using the #pragma directive, you would put the following line into your code:

#pragma loop_opt(on)

Conversely, you can turn off loop optimization by inserting the following line into your code:

#pragma loop_opt(off) Source: CoolInterview.com

ya we can use better way
#pragma pre processor
In case of structure memory is padding while declaring of structure
to over come this problem better way....
we write our code as follows
#pragma pack(push)
#pragma pack(1)
place this before structure we can aviod padding in structure Source: CoolInterview.com

the pragma is define a set of programm Source: CoolInterview.com

Program is set of instruction. After execution of program the instruction is followed by the machine or PC. Source: CoolInterview.com

The #pragma preprocessor directive.use full for turn on and turn of features of compiler . Source: CoolInterview.com

A set of program is called pragma Source: CoolInterview.com

pragma is a collection of programs
which is mainly used for turning on or off features of compiler Source: CoolInterview.com

pragma is a preprocessor directive using which we can combine the application of the C language along with assembly language for changes that could be made to hardware such as microprocessors, microcontrollers etc. Comments invited. Source: CoolInterview.com

#pragma is a pre processor directive. This tells us which function do we start our execution of the program usinf #pragma startup<function-name> and which funtion should the execution end using the #pragma exit<function-name>. Source: CoolInterview.com

this is an implementation define directive that allows various instruction tobe given to the compiler
its syntax
#pragma name Source: CoolInterview.com

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