The document discusses different types of arrays in C++, including one-dimensional, two-dimensional, and multi-dimensional arrays. It explains the syntax for declaring each type of array and provides examples of code to initialize and output array values. The document also covers some rules for subscripted variables in arrays.

2. Arrays in c++
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3. Arrays in c ++
• An array is a collection of same type of
elements which are sheltered under a
common name.

4. One-dimensional arrays
• One dimensional array have only one
subscript under a common name.
• syntax
• Data_type array_name[array_size];
• Example
• int age[5]={2,4,34,3,4};

5. Example program
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#include<iostream>
using namespace std;
int main()
{
int a[4];
int i ;
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for (i = 0; i < 4; i++)
{
a[i][j] = 0;
cout << a[i][j]<<" " ;
}
}

6. Two-dimensional arrays
• Two-dimensional array are those type of
array, which has finite number of rows and
finite number of columns.
• Data_type Array_name [row size][column
size];

7. Example program
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#include<iostream>
using namespace std;
int main()
{
int a[4][4];
int i , j;
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for (i = 0; i < 4; i++)
{
for ( j = 0; j < 4; j++)
{
a[i][j] = 0;
cout << a[i][j]<<" " ;
}
}
}

8. Multi-dimensional arrays
• An array have multiple subscript under a
common name.
• Syntax
• type name[size1][size2]...[sizeN];
• Example
• float a[2][6][7][4]….[n];

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#include<iostream>
using namespace std;
int main()
{
int a[4][4][4];
int i , j,k;
for (i = 0; i < 4; i++)
{
for ( j = 0; j < 4; j++)
{
for ( k = 0; k < 4; k++)
{
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a[i][j] [k]= 0;
cout << a[i][j][k]<<" " ;
}
}
}

10. • Subscripted Variable Rules
• Subscripted variables can be double, integer,
or character.
• The maximum number of subscripts is dictated by the
compiler vendor. Twelve is common.
• Arithmetic expressions may be used for subscripts.
• Subscripts must be integer valued.
• A statement must be included in your program which
sets aside storage space (dimensions) for your arrays.

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