initializing 2d vector
vector<vector<int> > vec( n , vector<int> (m, 0));initializing 2d vector
vector<vector<int> > vec( n , vector<int> (m, 0));accessing elements 2D array using pointers
#include<stdio.h>
//accessing elements of 2D array using pointers
int main(void){
int arr[4][4]={{1,2,3,4},{5,6,7,8},{9,0,1,2}};
int *ptr = &arr;
//accessing the elements of 2D array using ptr
for(int i=0;i<3;i++){
for(int j=0;j<4;j++)
printf("%d ",*((ptr+i*4)+j)); //4 is the number of columns
//*((ptr+i*4)+j) is similar to arr[i][j]
printf("\n");
}
return 0;
}c fill 2d array
// Either
int disp[2][4] = {
{10, 11, 12, 13},
{14, 15, 16, 17}
};
// Or
int disp[2][4] = { 10, 11, 12, 13, 14, 15, 16, 17};
// OR
int i, j;
for (i = 0; i < HEIGHT; i++) { // iterate through rows
for (j = 0; j < WIDTH; j++) { // iterate through columns
disp[i][j] = disp[i][j];
}
}Java 2d array initialization
class TwoDimensionalArray {
public static void main(String[] args) {
String[][] salutation = {
{"Mr. ", "Mrs. ", "Ms. "},
{"Kumar"}
};
// Mr. Kumar
System.out.println(salutation[0][0] + salutation[1][0]);
// Mrs. Kumar
System.out.println(salutation[0][1] + salutation[1][0]);
}
}
The output from this program is:
Mr. Kumar
Mrs. Kumarinitialize 2d array c++
#include <array>
2 #include <iostream>
3
4 using namespace std;
5
6 //remember const!
7 const int ROWS = 2;
8 const int COLS = 3;
int main(){
array<array<int, COLS>, ROWS> matrix = {
1, 2, 3,
4, 5, 6
};
return 0;
}Copyright © 2021 Codeinu
Forgot your account's password or having trouble logging into your Account? Don't worry, we'll help you to get back your account. Enter your email address and we'll send you a recovery link to reset your password. If you are experiencing problems resetting your password contact us
