How can you quickly find the number of elements stored in a
a) static array b) dynamic array ?

Answers were Sorted based on User's Feedback



How can you quickly find the number of elements stored in a a) static array b) dynamic array ?..

Answer / santhosh kumar sahukari

1.for static array we can find the no.of elements of its by using sizeof() operator and data type of that array.
2.we can find the no.of elements by its subscript in static array.
eg: int arr[10]
we can use sizeof(arr) to find the no.of elements it v l print 20,then we can divide it by 2 as size of int is 2.
2.subscript tells us it has 10 elements.

for dynamic array we cant use sizeof() operator.
we cant say dat how many elements it will have..it will be decided at runtime only.

Is This Answer Correct ?    4 Yes 0 No

How can you quickly find the number of elements stored in a a) static array b) dynamic array ?..

Answer / jaroosh

a) sizeof(array)/sizeof(element)
b) you cant (well, you can, eg. by using realloc, counting
from 0 up, and checking the result etc. but this is absurd),
its best to keep track somehow how many elements are there
in the array, but the BEST solution is...do NOT use dynamic
arrays at all, use std containers instead like vector.

Is This Answer Correct ?    3 Yes 0 No

How can you quickly find the number of elements stored in a a) static array b) dynamic array ?..

Answer / murali

for static array start from highest index to lowest (
normal conditions apply*)
if dynamic array is a Container type, size() / length()
will do. if not process the nodes.

Is This Answer Correct ?    0 Yes 1 No

How can you quickly find the number of elements stored in a a) static array b) dynamic array ?..

Answer / brainless

b) use pointer of last element - pointer of first element + 1

However, we should know the last element's pointer...

Is This Answer Correct ?    0 Yes 2 No

How can you quickly find the number of elements stored in a a) static array b) dynamic array ?..

Answer / guest

static array

Is This Answer Correct ?    1 Yes 5 No

Post New Answer

More C++ General Interview Questions

What is difference between c++ and c ++ 14?

0 Answers  


What is the use of pointer in c++ with example?

0 Answers  


What do you understand by pure virtual function? Write about its use?

0 Answers  


What are the advantages of C++ programming compared to C programming?

2 Answers   HAL,


Can a Structure contain a Pointer to itself?

0 Answers  


Can we use clrscr in c++?

0 Answers  


Given the following function definition: int doit(int &x, int y, int &z) { x = 3*x; y = y + 5; z = x+y; return z - 4; } int a = 5, b = 7, c = 9, d = 11; d = doit(a,b,c);

2 Answers  


Explain "const" reference arguments in function?

0 Answers  


Describe linked list using C++ with an example.

0 Answers  


Differentiate between a template class and class template?

1 Answers  


Describe friend function & its advantages.

0 Answers   TCS,


can any one help to find a specific string between html tags which is changed to a sting.. weather.html looks (for location) is <location>somewhere</location> #include <iostream> #include <fstream> #include <string> using namespace std; string find_field(string myPage,string); int main (void) { string page, line, location, temperature; ifstream inputFile("weather.xml"); while(getline(inputFile, line)) { page.append(line); line.erase(); } // Now page is a string that contains the whole xml page // Here you need to write something that finds and // extracts location and temperature from the XML // data in the string page and stores them in // the strings location and temperature respectively location=find_field(page,"location"); temperature=find_field(page,"temp_c"); cout << "Location: "<<location << endl; cout << "Temperature: " << temperature << endl; system("pause"); } string find_field(string myPage,string find_string){ int temp=myPage.find(find_string); if(temp!=string::npos) { cout << "Match found at " << temp << endl; } return "found?"; } ///

0 Answers  


Categories