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Why pointer variable sometimes desirable to pass a pointer to a function as an argument?
Frequently, a called function needs to make changes to objects declared in the calling function. For example, the function, scan(), needs to access objects in the calling function to store the data read and converted into an object defined there. Therefore, we supply scan() with the address of objects rather than their values.
Another common use of pointers is to write functions that ''return'' more than one value. As we have seen, every function in C returns a value as the value of the function; however, if a function's meaning includes the return of several pieces of information, this single return value is not sufficient. In these cases, we can have the function return multiple data values indirectly, using pointers.
What is the use of status command, data output command, and data input command. A status command is used to test a variety of status conditions in the interface and the periphe
Instruction Length: Variable-length instructions (Intel 80x86, VAX) need multi-step fetch and decode, but permit for a much more flexible and compressed instruction set.
prepare FTR
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Q. Why we need parallel programming languages? The parallel programming languages are created for parallel computer environments. These are developed either by creating new la
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Explain in detail about Touch screens For people who can't use a keyboard allowing input; also helps people with learning difficulties since icons are easier to understand
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