OOPS - Why doesn't C have nested functions?

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Why doesn't C have nested functions?

Total Answers and Comments: 6

Last Update: April 20, 2007

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Best Rated Answer

—

Submitted by: priti

#include<stdio.h>

int add(int a,int b)
{
    int c=3;
    int d=a+b;

    int addToC(int c, int d )
    {
        printf("This is addToC.....n");
        return(c+d);
    }
    return(addToC(c,d));

}

int main()
{
    printf(" Addition   %d n" ,add(1,2));
    return 0;

}

Above answer was rated as good by the following members:
gunturi.prabhakar

August 13, 2005 12:02:57

hariharan

RE: Why doesn't C have nested functions?

we does not have nested functions in c because we use concept of friend function

Is this answer useful? Yes | No

August 26, 2005 09:52:36

satish

RE: Why doesn't C have nested functions?

We don't have anything like friend function in C it is in C++

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July 31, 2006 01:39:59

praveena

RE: Why doesn't C have nested functions?

since it has friend function it doesnt have nested function

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November 17, 2006 14:21:44

s.vamsikrishna

RE: Why doesn’t C have nested functions?

c does not have nested functions because c doesnot not support encapsulation.in c each and every function is independent to each other and performs its assigned task separately

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January 18, 2007 01:22:42

priti

RE: C Has Nested FunctionWhy doesn't C have nested functions?

#include<stdio.h>

int add(int a,int b)
{
    int c=3;
    int d=a+b;

    int addToC(int c, int d )
    {
        printf("This is addToC.....n");
        return(c+d);
    }
    return(addToC(c,d));

}

int main()
{
    printf(" Addition   %d n" ,add(1,2));
    return 0;

}

Is this answer useful? Yes | No

1 0

Overall Rating: +1

April 20, 2007 06:55:31

govardhan

RE: answerWhy doesn't C have nested functions?

It's not trivial to implement nested functions such that they have the proper access to local variables in the containing function(s), so they were deliberately left out of C as a simplification. (gcc does allow them, as an extension.) For many potential uses of nested functions (e.g. qsort comparison functions), an adequate if slightly cumbersome solution is to use an adjacent function with static declaration, communicating if necessary via a few static variables. (A cleaner solution, though unsupported by qsort, is to pass around a pointer to a structure containing the necessary context.)

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