What is macro and its features?

What is macro and its features?

Macro represents a group of commonly used statements in the source programming language. Macro Processor replaces each macro instruction with the corresponding group of source language statements. This is known as the expansion of macros.

What is macro function in system programming?

A macro is a name given to a block of C statements as a pre-processor directive. Being a pre-processor, the block of code is communicated to the compiler before entering into the actual coding (main () function). A macro is defined with the pre-processor directive.

What are macros explain with example?

The definition of a macro is one command on the computer that performs many commands at once. An example of a macro is using Excel VBA to create multi function commands in the Microsoft program Excel.

What are the advantages of macro?

Advantages of Macros

• Macros hold the details of an operation in a module that can be used “as if” it were a single instruction.
• A frequently used sequence of instructions can be defined as a macro.
• Macros are used to build up complex operations out of simpler operations.
• Libraries of useful macros can be created.

What is macro assembler in system programming?

An assembler that brings high-level language features to assembly language programming. It translates a single multi-argument source line o code into a sequence of machine instructions.

How many types of macros are there in system programming?

There are two types of macros: Object-like Macros. Function-like Macros.

What are macros and its advantages and disadvantages?

The advantage of macro is that it reduces the time taken for control transfer as in the case of function. The disadvantage of it is here the entire code is substituted so the program becomes lengthy if a macro is called several times.

What are advantages of macro?

What is the macro feature?

The macro feature is an extension of the Natural language and consists of two types of statement, identified in the source by the macro character (in the given examples, the paragraph sign (§) is used). These statements are: Executed during macro expansion; these statements must be preceded by the macro character followed by a blank.

What is a macro definition in Assembly?

A macro definition is a named sequence of statements you can call with a macro instruction. When it is called, the assembler processes and normally generates assembler language statements from the definition into the source module. The statements generated can be:

What is the function of a macro processor?

The macro processor effectively constitutes a separate language processor with its own language. It provides a name to the sequence of statements (called macro name) that are repeated and ever needed it make use of the name in the main program.

What is the use of macro instruction?

Once the macro is defined then the name of macro instruction now acts as a mnemonic in assembly language that is equivalent to sequence of the statements. Now whenever the macro instruction is encountered, the whole of the macro gets substituted in place of the macro instruction.