C Program On Arrays With Output For Placement Exams
Hello guys, welcome back to my blog. In this article, I will share some C program on arrays, I will share codes with outputs and this article will be helpful for those who are preparing for interviews.
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C Program On Arrays
01. Write a C program for addition and subtraction of two matrix?
#include <stdio.h>
int main()
{
int m, n, c, d, first[10][10], second[10][10], sum[10][10];
printf("Enter the number of rows and columns in the matrix\n");
scanf("%d %d",&m,&n);
printf("Enter the elements of the 1st matrix: \n");
for(c=0; c<m; c++)
for(d=0; d<n; d++)
scanf("%d", &first[c][d]);
printf("Enter the elements of the 2nd matrix :\n");
for(c=0; c<m; c++)
for(d=0; d<n; d++)
scanf("%d", &second[c][d]);
for(c=0; c<m; c++)
for(d=0; d<n; d++)
sum[c][d] = first[c][d] + second[c][d];
printf("Sum of entered matrix is: \n");
for(c=0; c<m; c++)
{
for(d=0;d<n;d++)
printf("%d\t",sum[c][d]);
printf("\n");
}
for(c=0; c<m; c++)
for(d=0; d<n; d++)
sum[c][d] = first[c][d] - second[c][d];
printf("Difference b/t entered matrix: \n");
for(c=0; c<m; c++)
{
for(d=0; d<n; d++)
printf("%d\t", sum[c][d]);
printf("\n");
}
return 0;
}
Output:
Enter the number of rows and columns in the matrix
3
3
Enter the elements of the 1st matrix:
2
3
5
1
2
3
4
5
6
Enter the elements of the 2nd matrix :
6
4
3
1
2
9
8
2
3
Sum of entered matrix is:
8 7 8
2 4 12
12 7 9
Difference b/t entered matrix:
-4 -1 2
0 0 -6
-4 3 3
02. Write a C Program on addition of two matrix?
#include <stdio.h>
#include <stdlib.h>
int main()
{
int m, n, c, d, first[10][10], second[10][10], sum[10][10];
printf("Enter the number of columns and rows of matrix: \n");
scanf("%d%d",&m, &n);
printf("Enter the elements of 1st matrix :\n");
for(c=0; c<m; c++)
{
for(d=0; d<n; d++)
{
scanf("%d",& first[c][d]);
}
}
printf("Enter the elements of 2nd matrix: \n");
for(c=0; c<m; c++)
{
for(d=0; d<n; d++)
{
scanf("%d",& second[c][d]);
}
}
printf("Sum of entered matrix: \n");
for(c=0; c<m; c++)
{
for(d=0; d<n; d++)
{
sum[c][d] = first[c][d] + second[c][d];
printf("%d\t", sum[c][d]);
}
printf("\n");
}
return 0;
}
Output:
Enter the number of columns and rows of matrix:
3
3
Enter the elements of 1st matrix :
2
3
4
1
3
5
7
4
2
Enter the elements of 2nd matrix:
3
45
1
0
7
6
4
2
5
Sum of entered matrix:
5 48 5
1 10 11
11 6 7
02. Write a C program to store elements in array and display in ascending order?
#include <stdio.h>
int main()
{
int i, j, a, n, number[30];
printf("Enter the value of N \n");
scanf("%d", &n);
printf("Enter the numbers \n");
for (i = 0; i < n; ++i)
{
scanf("%d", &number[i]);
}
for (i = 0; i < n; ++i)
{
for (j = i + 1; j < n; ++j)
{
if (number[i] > number[j])
{
a = number[i];
number[i] = number[j];
number[j] = a;
}
}
}
printf("The numbers arranged in an ascending order are given : \n");
for (i = 0; i < n; ++i)
{
printf("%d\n", number[i]);
}
return 0;
}
Output:
Enter the value of N
8
Enter the numbers
2
34
65
12
98
43
32
76
The numbers arranged in an ascending order are given :
2
12
32
34
43
65
76
98
03. Write a C program to check matrix is a sparse matrix or not?
#include <stdio.h>
int main()
{
static int array[10][10];
int i, j, m, n;
int counter = 0;
printf("Enter the order of the matix : ");
scanf("%d %d", &m, &n);
printf("Enter the co-efficients of the matix \n");
for (i = 0; i < m; ++i)
{
for (j = 0; j < n; ++j)
{
scanf("%d", &array[i][j]);
if (array[i][j] == 0)
{
++counter;
}
}
}
if (counter > ((m * n) / 2))
{
printf("The matrix is sparse matrix \n");
}
else
{
printf("The matrix is not a sparse matrix \n");
}
printf("There are %d number of zeros", counter);
return 0;
}
Output:
Enter the order of the matix : 3
3
Enter the co-efficients of the matix
1
0
0
0
1
0
0
0
1
The matrix is sparse matrix
04. Write a C program to delete element in an array?
#include <stdio.h>
int main()
{
int array[100], position, c, n;
printf("Enter number of elements in array :\n");
scanf("%d", &n);
printf("Enter %d elements :\n", n);
for (c = 0; c < n; c++)
scanf("%d", &array[c]);
printf("Enter the location where you wish to delete element :\n");
scanf("%d", &position);
if (position >= n + 1)
printf("Deletion not possible.\n");
else
{
for (c = position - 1; c < n - 1; c++)
array[c] = array[c + 1];
printf("Resultant array is\n");
for (c = 0; c < n - 1; c++)
printf("%d\n", array[c]);
}
return 0;
}
Output:
Enter number of elements in array :
8
Enter 8 elements :
23
1
76
44
34
32
99
73
Enter the location where you wish to delete element :
4
Resultant array is
23
1
76
34
32
99
73
05. Write a C program to delete user given number or particular value in an array?
#include <stdio.h>
int main()
{
int vectorx[10];
int i, n, pos, element, found = 0;
printf("Enter how many elements: \n");
scanf("%d", &n);
printf("Enter the elements: \n");
for (i = 0; i < n; i++)
{
scanf("%d", &vectorx[i]);
}
printf("Input array elements are :\n");
for (i = 0; i < n; i++)
{
printf("%d\n", vectorx[i]);
}
printf("Enter the element to be deleted :\n");
scanf("%d", &element);
for (i = 0; i < n; i++)
{
if (vectorx[i] == element)
{
found = 1;
pos = i;
break;
}
}
if (found == 1)
{
for (i = pos; i < n - 1; i++)
{
vectorx[i] = vectorx[i + 1];
}
printf("The resultant vector is \n");
for (i = 0; i < n - 1; i++)
{
printf("%d\n", vectorx[i]);
}
}
else
{
printf("Element %d is not found in the vector: \n", element);
}
return 0;
}
Output:
Enter how many elements:
8
Enter the elements:
4
33
23
78
99
88
43
29
Input array elements are :
4
33
23
78
99
88
43
29
Enter the element to be deleted :
99
The resultant vector is
4
33
23
78
88
43
29
06. Write a C program to find determinant of 2 * 2 matrix?
#include<stdio.h>
int main()
{
int a[2][2], i, j;
long determinant;
printf("Enter the 4 elements of matrix :\n");
for (i = 0; i < 2; i++)
{
for (j = 0; j < 2; j++)
{
scanf("%d", &a[i][j]);
}
}
printf("\nThe matrix is\n");
for (i = 0; i < 2; i++)
{
printf("\n");
for (j = 0; j < 2; j++)
{
printf("%d\t", a[i][j]);
}
}
determinant = a[0][0] * a[1][1] - a[1][0] * a[0][1];
printf("\nDeterminant of 2X2 matrix: %ld", determinant);
return 0;
}
Output:
Enter the 4 elements of matrix :
4
6
3
2
The matrix is
4 6
3 2
Determinant of 2X2 matrix: -10
07. Write a C program to find determinant of 3*3 matrix?
#include<stdio.h>
int main()
{
int a[3][3], i, j;
long determinant;
printf("Enter the 9 elements in the matrix :\n");
for (i = 0; i < 3; i++)
for (j = 0; j < 3; j++)
scanf("%d", &a[i][j]);
printf("\nThe matrix is\n");
for (i = 0; i < 3; i++)
{
printf("\n");
for (j = 0; j < 3; j++)
printf("%d\t", a[i][j]);
}
determinant = a[0][0] * ((a[1][1] * a[2][2]) - (a[2][1] * a[1][2]))
- a[0][1] * (a[1][0] * a[2][2] - a[2][0] * a[1][2])
+ a[0][2] * (a[1][0] * a[2][1] - a[2][0] * a[1][1]);
printf("\nThe determinant of 3X3 matrix: %d", determinant);
return 0;
}
Output:
Enter the 9 elements of matrix :
4
5
6
3
9
8
1
2
6
The matrix is
4 5 6
3 9 8
1 2 6
Determinant of 3X3 matrix: 84
08. Write a C program to find smallest and largest element in an arrray?
#include<stdio.h>
int main()
{
int a[50], size, i, big, small;
printf("\nEnter the size of the array: ");
scanf("%d", &size);
printf("\nEnter %d elements in to the array: ", size);
for (i = 0; i < size; i++)
{
scanf("%d", &a[i]);
}
big = a[0];
for (i = 1; i < size; i++)
{
if (big < a[i])
{
big = a[i];
}
}
printf("Largest element: %d", big);
small = a[0];
for (i = 1; i < size; i++)
{
if (small > a[i])
{
small = a[i];
}
}
printf("\nSmallest element: %d", small);
return 0;
}
Output:
Enter the size of the array: 8
Enter 8 elements in to the array: 3
4
56
12
99
67
53
76
Largest element: 99
Smallest element: 3
09. Write a C program to find matrix is identity matrix or not?
#include <stdio.h>
int main()
{
int a[10][10];
int i, j, row, column, flag = 1;
printf("Enter the dimensions of the matrix A : ");
scanf("%d %d", &row, &column);
printf("Enter the elements of matrix A \n");
for (i = 0; i < row; i++)
{
for (j = 0; j < column; j++)
{
scanf("%d", &a[i][j]);
}
}
printf("MATRIX A is \n");
for (i = 0; i < row; i++)
{
for (j = 0; j < column; j++)
{
printf("%3d", a[i][j]);
}
printf("\n");
}
for (i = 0; i < row; i++)
{
for (j = 0; j < column; j++)
{
if (a[i][j] != 1 && a[j][i] != 0)
{
flag = 0;
break;
}
}
}
if (flag == 1)
printf("It is identity matrix \n");
else
printf("It is not a identity matrix \n");
}
Output:
Enter the dimensions of the matrix A : 3
3
Enter the elements of matrix A
3
4
5
9
1
6
4
3
2
MATRIX A is
3 4 5
9 1 6
4 3 2
It is not a identity matrix
Enter the dimensions of the matrix A : 3
3
Enter the elements of matrix A
1
0
0
0
1
0
0
0
1
MATRIX A is
1 0 0
0 1 0
0 0 1
It is identity matrix
10. Write a C program to implement Queue using array?
#include <stdio.h>
#include <stdlib.h>
#define MAX 50
int queue_array[MAX];
int rear = -1;
int front = -1;
void insert()
{
int add_item;
if (rear == MAX - 1)
{
printf("Queue Overflow \n");
}
else
{
if (front == -1)
{
// If queue is initially empty
front = 0;
}
printf("Inset the element in queue : ");
scanf("%d", &add_item);
rear = rear + 1;
queue_array[rear] = add_item;
}
}
void display()
{
int i;
if (front == -1)
{
printf("Queue is empty \n");
}
else
{
printf("Queue is : \n");
for (i = front; i <= rear; i++)
{
printf("%d ", queue_array[i]);
}
printf("\n");
}
}
void deleteElement()
{
if (front == -1 || front > rear)
{
printf("Queue Underflow \n");
return;
}
else
{
printf("Element deleted from queue is : %d\n", queue_array[front]);
front = front + 1;
}
}
int main()
{
int choice;
printf("1.Insert element to queue \n");
printf("2.Delete element from queue \n");
printf("3.Display all elements of queue \n");
printf("4.Quit \n");
while (1)
{
printf("Enter your choice : ");
scanf("%d", &choice);
switch (choice)
{
case 1:
insert();
break;
case 2:
deleteElement();
break;
case 3:
display();
break;
case 4:
exit(1);
default:
printf("Wrong choice \n");
}
}
}
Output:
1.Insert element to queue
2.Delete element from queue
3.Display all elements of queue
4.Quit
Enter your choice : 1
Inset the element in queue : 2
Enter your choice : 1
Inset the element in queue : 7
Enter your choice : 1
Inset the element in queue : 9
Enter your choice : 3
Queue is :
2 7 9
Enter your choice : 2
Element deleted from queue is : 2
Enter your choice : 3
Queue is :
7 9
Enter your choice : 1
Inset the element in queue : 2
Enter your choice : 3
Queue is :
7 9 2
Enter your choice : 2
Element deleted from queue is : 7
Enter your choice : 3
Queue is :
9 2
Enter your choice :
11. Write a C program to implement stack using array?
#include <stdio.h>
#define MAX 5
int top, status;
// PUSH FUNCTION
void push(int stack[], int item)
{
if (top == (MAX - 1))
status = 0;
else
{
status = 1;
++top;
stack[top] = item;
}
}
// POP FUNCTION
int pop(int stack[])
{
int ret;
if (top == -1)
{
ret = 0;
status = 0;
}
else
{
status = 1;
ret = stack[top];
--top;
}
return ret;
}
// FUNCTION TO DISPLAY STACK
void display(int stack[])
{
int i;
printf("\nThe Stack is: ");
if (top == -1)
printf("empty");
else
{
for (i = top; i >= 0; --i)
printf("\n--------\n|%3d |\n--------", stack[i]);
}
printf("\n");
}
int main()
{
int stack[MAX], item;
int ch;
top = -1;
printf("\nMAIN MENU");
printf("\n1.PUSH (Insert) in the Stack");
printf("\n2.POP (Delete) from the Stack");
printf("\n3.Exit (End the Execution)");
do
{
do
{
printf("\nEnter Your Choice: ");
scanf("%d", &ch);
if (ch < 1 || ch > 3)
printf("\nInvalid Choice, Please try again");
} while (ch < 1 || ch > 3);
switch (ch)
{
case 1:
printf("\nEnter the Element to be pushed : ");
scanf("%d", &item);
printf("%d", item);
push(stack, item);
if (status)
{
printf("\nAfter Pushing ");
display(stack);
if (top == (MAX - 1))
printf("\nThe Stack is Full");
}
else
printf("\nStack overflow on Push");
break;
case 2:
item = pop(stack);
if (status)
{
printf("\nThe Popped item is %d. After Popping: ", item);
display(stack);
}
else
printf("\nStack underflow on Pop");
break;
default:
printf("\nEND OF EXECUTION");
}
} while (ch != 3);
return 0;
}
Output:
MAIN MENU
1.PUSH (Insert) in the Stack
2.POP (Delete) from the Stack
3.Exit (End the Execution)
Enter Your Choice: 1
Enter the Element to be pushed : 34
34
After Pushing
The Stack is:
--------
| 34 |
--------
Enter Your Choice: 1
Enter the Element to be pushed : 88
88
After Pushing
The Stack is:
--------
| 88 |
--------
--------
| 34 |
--------
Enter Your Choice: 1
Enter the Element to be pushed : 43
43
After Pushing
The Stack is:
--------
| 43 |
--------
--------
| 88 |
--------
--------
| 34 |
--------
Enter Your Choice: 2
The Popped item is 43. After Popping:
The Stack is:
--------
| 88 |
--------
--------
| 34 |
--------
Enter Your Choice: 3
END OF EXECUTION
12. Write a C program to insert element in an array?
#include <stdio.h>
int main()
{
int array[100], position, c, n, value;
printf("Enter number of elements in array : ");
scanf("%d", &n);
printf("Enter %d elements : ", n);
for (c = 0; c < n; c++)
{
scanf("%d", &array[c]);
}
printf("Enter the location where you want to insert an element : ");
scanf("%d", &position);
printf("Enter the value to insert : ");
scanf("%d", &value);
for (c = n - 1; c >= position - 1; c--)
{
array[c + 1] = array[c];
}
array[position - 1] = value;
printf("Resultant array is\t");
for (c = 0; c <= n; c++)
{
printf("%d\t", array[c]);
}
return 0;
}
Output:
Enter 8 elements : 34
23
98
56
45
12
88
44
Enter the location where you wish to insert an element : 4
Enter the value to insert : 29
Resultant array is 34 23 98 29 56 45 12 88 44
13. Write a C program to inverse the matrix?
#include<stdio.h>
void reduction(float a[][6], int size, int pivot, int col)
{
int i, j;
float factor;
factor = a[pivot][col];
for (i = 0; i < 2 * size; i++)
{
a[pivot][i] /= factor;
}
for (i = 0; i < size; i++)
{
if (i != pivot)
{
factor = a[i][col];
for (j = 0; j < 2 * size; j++)
{
a[i][j] = a[i][j] - a[pivot][j] * factor;
}
}
}
}
int main()
{
float matrix[3][6];
int i, j;
for (i = 0; i < 3; i++)
{
for (j = 0; j < 6; j++)
{
if (j == i + 3)
{
matrix[i][j] = 1;
}
else
{
matrix[i][j] = 0;
}
}
}
printf("\nEnter a 3 X 3 Matrix :");
for (i = 0; i < 3; i++)
{
for (j = 0; j < 3; j++)
{
scanf("%f", &matrix[i][j]);
}
}
for (i = 0; i < 3; i++)
{
reduction(matrix, 3, i, i);
}
printf("\nInvers Matrix");
for (i = 0; i < 3; i++)
{
printf("\n");
for (j = 0; j < 3; j++)
{
printf("%8.3f", matrix[i][j + 3]);
}
}
return 0;
}
Output:
Enter a 3 X 3 Matrix :43
23
12
77
65
45
98
12
10
Invers Matrix
0.005 -0.004 0.011
0.158 -0.032 -0.044
-0.236 0.075 0.044
14. C code for magic matrix?
#include<stdio.h>
int main()
{
int i, j = 1, l, n;
int mm[50][50], x, y, z;
int c = 0;
label:
printf("Enter the Order of Magic Matrix(Odd) : ");
scanf("%d", &n);
printf("\n");
if (n % 2 == 0)
{
printf("Enter Odd Numbers Only\n\n");
goto label;
}
//find the middle column
l = (n + 1) / 2;
//set all the elements to be used to 0
for (x = 1; x <= n; x++)
{
for (y = 1; y <= n; y++)
{
mm[x][y] = NULL;
}
}
for (i = 1; i <= (n * n); i++)
{
if (mm[j][l] == NULL)
{
mm[j][l] = i;
}
else
{
j = j + 2;
l--;
if (j == n + 2)
j = 2;
if (l == 0)
l = n;
if (j == 0)
j = n;
if (l == n + 1)
l = 1;
mm[j][l] = i;
}
j--;
l++;
if (j == 0)
j = n;
if (l == n + 1)
l = 1;
}
for (x = 1; x <= n; x++)
{
for (y = 1; y <= n; y++)
{
z = mm[x][y];
while (z > 0)
{
z = z / 10;
c++;
}
if (c == 1)
printf(" 0%d", mm[x][y]);
else
printf(" %d", mm[x][y]);
if (y % n == 0)
printf("\n\n");
c = 0;
}
}
return 0;
}
Output:
Enter the Order of Magic Matrix(Odd) : 5
17 24 01 08 15
23 05 07 14 16
04 06 13 20 22
10 12 19 21 03
11 18 25 02 09
Enter the Order of Magic Matrix(Odd) : 6
Enter Odd Numbers Only
Enter the Order of Magic Matrix(Odd) : 3
08 01 06
03 05 07
04 09 02
15. Write a C program for matrix multiplication?
#include <stdio.h>
int main()
{
int m, n, p, q, c, d, k, sum = 0;
int first[10][10], second[10][10], multiply[10][10];
printf("Enter the no of rows and columns of 1st matrix :\n");
scanf("%d%d", &m, &n);
printf("Enter the elements of 1st matrix\n");
for (c = 0; c < m; c++)
for (d = 0; d < n; d++)
scanf("%d", &first[c][d]);
printf("Enter the no of rows and columns of 2nd matrix\n");
scanf("%d%d", &p, &q);
if (n != p)
printf("Matrices with entered orders can not be multiplied with each other.\n");
else
{
printf("Enter the elements of 2nd matrix\n");
for (c = 0; c < p; c++)
for (d = 0; d < q; d++)
scanf("%d", &second[c][d]);
for (c = 0; c < m; c++)
{
for (d = 0; d < q; d++)
{
for (k = 0; k < p; k++)
{
sum = sum + first[c][k] * second[k][d];
}
multiply[c][d] = sum;
sum = 0;
}
}
printf("Product of entered matrices:-\n");
for (c = 0; c < m; c++)
{
for (d = 0; d < q; d++)
printf("%d\t", multiply[c][d]);
printf("\n");
}
}
return 0;
}
Output:
Enter the no of rows and columns of 1st matrix :
3
3
Enter the elements of 1st matrix
2
3
4
3
1
7
9
5
2
Enter the no of rows and columns of 2nd matrix
3
3
Enter the elements of 2nd matrix
1
9
3
7
2
8
5
1
9
Product of entered matrices:-
43 28 66
45 36 80
54 93 85
Enter the no of rows and columns of 1st matrix :
3
3
Enter the elements of 1st matrix
3
9
1
9
2
7
5
1
4
Enter the no of rows and columns of 2nd matrix
4
5
Matrices with entered orders can not be multiplied with each other.
This was about the C program on arrays. I hope this article may help you all a lot. Thank you for reading.
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