Is using `int` more preferable than using `unsigned int`?

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Speed difference between using int and unsigned int when mixed with doubles

I have an application where part of the inner loop was basically: double sum = 0; for (int i = 0; i != N; ++i, ++data, ++x) sum += *data * x; If x is an unsigned int, then the code takes 3 times as long as with int! This was part of a larger code-base, but I got it down to the essentials: #include <iostream> #include <cstdlib> #include <vector> #include <time.h> typedef unsigned char uint8; template<typename T> double moments(const uint8* data, int N, T wrap)...

Answer:

Here's why: many common architectures (including x86) have a hardware instruction to convert signed...

luispedro at Stack Overflow Mark as irrelevant Marked as irrelevant Undo

Other solutions

I have a code where I am using data-types such as int, unsignedint, and unsigned char. How beneficial/futile (in terms of memory/speed) will the activity of changing all the data-types to int be?

The code has several structures defined having bytes,int, char inside them. Will it bring any performance improvements in terms of memory/speed considering structure padding and other factors?

Answer:

Please note that you can only save memory by using packed structures, but when you use packed structure...

Dorin LazÄr at Quora Mark as irrelevant Marked as irrelevant Undo

Could someone show me a code demo of a 1D array that has fixed int's and is then stored in a result using a loop?

I have this int[] anArray = { 1,2,3,4,5,6,7,8,9}; int total = 0; for(int x = 0; x < anArray.length; x++){ total += anArray[x]; } System.out.println(anArray[total]); It compiles, but does run. I just want it...

Answer:

Well if you want to print the numbers in the array you must do System.out.println(anArray[x]) each time...

JuliÃ¡n SolÃ³rzano at Quora Mark as irrelevant Marked as irrelevant Undo

Java: im using a loop to print the sum of odd numbers, of an int = i,?

Right now my program runs as enter a number: 7 1 + 3 + 5 + 7 + = 16 i need it to run as: ex. enter a number: 7 1+3+5+7=7+5+3+1 i can't figure out how to stop the loop from printing the extra "+" sign and then need to print the function in reverse...

Answer:

Well, where you typed your "if" block, I would replace: if ( ( i == input ) && ( i...

Jere Kane at Yahoo! Answers Mark as irrelevant Marked as irrelevant Undo

Program using char *field_buffer() and int set_field_buffer()?

can anyone give an example of a program using char *field_buffer() and int set_field_buffer(). i need it .its urgent

Answer:

What do you mean? An example of code I assume? What language?

smeagol at Yahoo! Answers Mark as irrelevant Marked as irrelevant Undo

How long, using Ebay's 'Standard Int'l Flat Rate Postage', will it take to arrive from the US to the UK?

I ordered an iphone from a shop on ebay that is in Boston. They say they will be using FedEx and that it will be shipped out after 1 business day. How long would it take? I just mean like generally..

Answer:

I would count on two weeks for sure. You can never tell how long it will take in customs.

loyddd at Yahoo! Answers Mark as irrelevant Marked as irrelevant Undo

What's the difference between a Scala function definition using "object myfunction extends (int => int) { def apply(n:int) {...}}" and "def myfunction(n:int) {}"?

I am reading the code here(http://github.com/nkallen/Rowz/b...) but don't understand it well.

Answer:

Scala methods ("defs") are just like Java methods. Scala also has function objects, which...

David Greenspan at Quora Mark as irrelevant Marked as irrelevant Undo

Why is Integer array [] preferred over an int array [] in java in competitive programming? Is there any difference in performance as one of my solution using the primitive int gave TLE while using the object array was AC?

The program contained only Arrays.sort(array) method apart from an O(n) algorithm.

Answer:

An integer array is preffered over an int array as integer is a wrapper class in java which helps us...

Karan Kapoor at Quora Mark as irrelevant Marked as irrelevant Undo

Building has 11 apartments.Using the below details what is the total internal Square Metre space of the entire block of Flats. Int Length of building 23 mt.Int Depth of Building 7 mt. It has 4 floors?

Answer:

what is the total internal Square Metre space of the entire block of apartments? Internal Length of...

community wiki at wiki.answers.com Mark as irrelevant Marked as irrelevant Undo

Rewrite the loop without using break. Keep the output the same. #include<stdio.h> int main() { int k, sum; for (sum=k=1; k<10;k++) { sum *=k; if (sum>10*k) breal; } printf(“D. %i %i n”,k,sum); return 0; }

Answer:

#include<stdio.h> int main() { int k=1, sum=1; while((sum<=10*k) && (k<10)) { sum...

Anonymous at Answerbag.com Mark as irrelevant Marked as irrelevant Undo

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