Two Dimensional Array
In this data will be stored in form of rows and colums i.e. table.
A list of items can be given one variable name using two subscripts and such a variable is called a two -subscripted variable or a two -dimensional array.
Declaration syntax:-
| Data_type array_name[nr][nc]; |
|---|
nr->no.of rows
nc->no.of columns
Initialization:-
int mat[2][3]=【{2,3,4}{5,6,7}】
i=0,j=0
1row,1col-->mat[0][0]=2;
1row,2col-->mat[0][1]=3;
1row,3col-->mat[0][2]=4;
.
.
.
2row,3col-->mat[1][2]=7;
In above example
int is data type
Mat is array name
2 is total no.of rows
3 is total no.of columns
2,3,4,5,6,7 is elements
Program on two dimensional array
(Addition of two matrix)
#include <iostream.h>
#include <conio.h>
class arr
{
int a[10][10],b[10][10],i, j,nr,nc;
public:
void acc();
void add();
};
void arr::acc()
{
cout<<"enter no of roos and colomus \n";
cin>>nr>>nc;
cout << "enter array values of a\n";
for (i = 0; i < nr; i++)
{
for (j = 0; j < nc; j++)
cin >> a[i][j];
}
cout << "enter Array values of b\n";
for (i = 0; i < nr; i++)
{
for (j = 0; j < nc; j++)
cin >> b[i][j];
}
}
#include <conio.h>
class arr
{
int a[10][10],b[10][10],i, j,nr,nc;
public:
void acc();
void add();
};
void arr::acc()
{
cout<<"enter no of roos and colomus \n";
cin>>nr>>nc;
cout << "enter array values of a\n";
for (i = 0; i < nr; i++)
{
for (j = 0; j < nc; j++)
cin >> a[i][j];
}
cout << "enter Array values of b\n";
for (i = 0; i < nr; i++)
{
for (j = 0; j < nc; j++)
cin >> b[i][j];
}
}
void arr::add()
{
cout<<"\naddition of matrix\n";
for(i=0;i<nr;i++)
{
for(j=0;j<nc;j++)
cout<<(a[i][j]+b[i][j])<<"\t";
cout<<endl;
}
}
void main()
{
arr a;
clrscr();
a.acc();
a.add();
getch();
}
{
cout<<"\naddition of matrix\n";
for(i=0;i<nr;i++)
{
for(j=0;j<nc;j++)
cout<<(a[i][j]+b[i][j])<<"\t";
cout<<endl;
}
}
void main()
{
arr a;
clrscr();
a.acc();
a.add();
getch();
}
Out Put:-
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