Treceți la conținutul principal

cpp array length

f you mean a C-style array, then you can do something like:

int a[7];
std::cout << "Length of array = " << (sizeof(a)/sizeof(*a)) << std::endl;
This doesn't work on pointers, though, i.e. it won't work for either of the following:

int *p = new int[7];
std::cout << "Length of array = " << (sizeof(p)/sizeof(*p)) << std::endl;
or:

void func(int *p)
{
    std::cout << "Length of array = " << (sizeof(p)/sizeof(*p)) << std::endl;
}

int a[7];
func(a);
In C++, if you want this kind of behaviour, then you should be using a container class; probably std::vector.

Comentarii

Postări populare de pe acest blog

WINDOWS 10 COMPUTER FREEZING PROBLEM SOLVED

good news : a BIOS UPDATE can resolve the problem but just for a Windows 7 on 64 bits o.s. and the system is not stable all the time. even after  bios update the system can freeze.
new info : u can try to low the screen brightness and see if this error appear so often after 
news: last info !!! maybe a virus. scann our system now with an antivirus i generate this error using other device ( a tablet pc) connected in the same network and the laptop i have this problem just freeze  http://thehackernews.com/2013/10/backdoor-found-in-chinese-tenda.html

news : if u use a tenda router this make couse all this problems



what i discover so far :
1.the electric company have many failure and affect the main ISP router/switch for building  also the router/switch installed by the ISP may be affected by overheating and will crash after a long utilisation on heat conditions 2.the router/switch of ISP affect any router of the user between this router and pc/laptop of client 3.the router and any other device of t…

program principal cpp

#include "clasa.h" #include <stdio.h> #include <conio.h> #include <stdlib.h> #include <string.h> #define DELAY 9000000 void delay() { for(long i=0;i<DELAY;i++); } //constructor cu initializare de la tastatura BigInt::BigInt() {char x; signed char t[400]; int i; printf("\nNumarul cu semn "); do s=getche(); while((s!='+')&&(s!='-')); n=0; do {x=getche(); t[n]=x-'0'; n++; } while((x>='0')&&(x<='9')); n--; for(i=0;i<n;i++) nr[i]=t[n-i-1]; } //constructor cu initializare prin parametri BigInt::BigInt(char semn,signed char numar[],int dim) {int i; s=semn; n=dim; for(i=0;i<n;i++) nr[i]=numar[n-i-1]; } //transform un int negativ in pozitiv int BigInt::Pozitiv(int x) {int a,vb; a=0; vb=0; while(vb==0) if((x+a)==0) vb=1; else a=a+1; x=a; return x; } //constructor dintr-un nr int obisnuit BigInt::BigInt(int x) {int i; if(x>=0) s='+'…

o aplicatie php localitati romania

//APLICATIA SE REFERA LA BAZA DE DATE SIRUTA

//dragtable.js


/* dragtable v1.0 June 26, 2008 Dan Vanderkam, http://danvk.org/dragtable/ http://code.google.com/p/dragtable/ \Bsortabledraggable\B Instructions: - Download this file - Add <script src="dragtable.js"></script> to your HTML. - Add class="draggable" to any table you might like to reorder. - Drag the headers around to reorder them. This is code was based on: - Stuart Langridge's SortTable (kryogenix.org/code/browser/sorttable) - Mike Hall's draggable class (http://www.brainjar.com/dhtml/drag/) - A discussion of permuting table columns on comp.lang.javascript Licensed under the MIT license. */ // Here's the notice from Mike Hall's draggable script: //***************************************************************************** // Do not remove this notice. // // Copyright 2001 by Mike Hall. // See http…