Bangladesh University of Business and Technology
(BUBT)
Lab Report-4
Submitted by : Submitted to :
Name : Sumon Saha
Name : Tanzid Ahsan Nirob
Intake : 44(DH) Designation : Assistant Professor.
ID : 20235203049
Section :2 Department : CSE
Department : CSE
P-1- Write a program in C to read n number of values in an array and display them in reverse
order.
Code-
#include<stdio.h>
void main(){
int n;
printf("please enter a positive number : ");
scanf("%d",&n);
int myNumber[n];
for(int i = 0; i < n; i++){
printf("please enter index %d : ",i);
scanf("%d",&myNumber[i]);
}
printf("\n");
for(int i= n-1; i >=0; i--){
printf("The value of index %d : %d \n",i ,myNumber[i]);
}
getch();
}
P-2 - Write a program in C to copy the elements of one array into another array.
Code-
#include<stdio.h>
int print(int,int[]);
void main(){
int n,i;
printf("please enter a positive number : ");
scanf("%d",&n);
int myNumber[n];
int myNumber2[sizeof(myNumber)];
for(i = 0; i < n; i++){
printf("put the value of mynumber array index %d : ",i);
scanf("%d",&myNumber[i]);
}
for(i = 0; i < n; i++){
myNumber2[i]=myNumber[i];
}
printf("value of myNumber : \n");
print(n,myNumber);
printf("value of myNumber2 : \n");
print(n,myNumber2);
return 0;
}
int print(int a,int b[]){
int i = 0;
int n = a;
for(i = 0; i < n; i++){
printf("the value of array index %d : %d \n",i ,b[i]);
}
}
Output:
P-3 - Write a program in C to count the total number of duplicate elements in an array.
Code-
#include<stdio.h>
void main(){
int n,i,sum=0;
printf("please enter a positive number : ");
scanf("%d",&n);
int myNumber[n];
for(i = 0; i < n; i++){
printf("put the value of mynumber array index %d : ",i);
scanf("%d",&myNumber[i]);
}
for(i = 0; i < n; i++){
for(int j = i + 1; j < n; j++) {
if(myNumber[i] == myNumber[j]){
sum++;
break;
}
}
}
printf("Total number of duplicate elament %d",sum);
return 0;
}
Output
P-4 - Write a program in C to merge two arrays of the same size sorted in descending order.
Code-
#include <stdio.h>
void main()
{
int arr1[100], arr2[100], arr3[200];
int s1, s2, s3;
int i, j, k;
printf("Input the number of elements to be stored in the first array :");
scanf("%d",&s1);
printf("Input %d elements in the array :\n",s1);
for(i=0;i<s1;i++)
{
printf("element - %d : ",i);
scanf("%d",&arr1[i]);
}
printf("Input the number of elements to be stored in the second array :");
scanf("%d",&s2);
printf("Input %d elements in the array :\n",s2);
for(i=0;i<s2;i++)
{
printf("element - %d : ",i);
scanf("%d",&arr2[i]);
}
s3 = s1 + s2;
for(i=0;i<s1; i++)
{
arr3[i] = arr1[i];
}
for(j=0;j<s2; j++)
{
arr3[i] = arr2[j];
i++;
}
for(i=0;i<s3; i++)
{
for(k=0;k<s3-1;k++)
{
if(arr3[k]<=arr3[k+1])
{
j=arr3[k+1];
arr3[k+1]=arr3[k];
arr3[k]=j;
}
}
}
for(i=0; i<s3; i++)
{
printf("%d ", arr3[i]);
}
printf("\n\n");
}
P-5 - Write a program in C to count the frequency of each element of an array.
Code-
#include <stdio.h>
void main()
{
int arr1[100], fr1[100];
int n, i, j, ctr;
printf("Input the number of elements to be stored in the array :");
scanf("%d",&n);
printf("Input %d elements in the array :\n",n);
for(i=0;i<n;i++)
{
printf("element - %d : ",i);
scanf("%d",&arr1[i]);
fr1[i] = -1;
}
for(i=0; i<n; i++)
{
ctr = 1;
for(j=i+1; j<n; j++)
{
if(arr1[i]==arr1[j])
{
ctr++;
fr1[j] = 0;
}
}
if(fr1[i]!=0)
{
fr1[i] = ctr;
}
}
printf("\nThe frequency of all elements of array : \n");
for(i=0; i<n; i++)
{
if(fr1[i]!=0)
{
printf("%d occurs %d times\n", arr1[i], fr1[i]);
}
}
}
P-6 Write a program in C to separate odd and even integers into separate arrays.
#include <stdio.h>
void main()
{
int arr1[10], arr2[10], arr3[10];
int i,j=0,k=0,n;
printf("Input the number of elements to be stored in the array :");
scanf("%d",&n);
for(i=0;i<n;i++)
{
printf("element - %d : ",i);
scanf("%d",&arr1[i]);
}
for(i=0;i<n;i++)
{
if (arr1[i]%2 == 0)
{
arr2[j] = arr1[i];
j++;
}
else
{
arr3[k] = arr1[i];
k++;
}
}
printf("\nThe Even elements are : \n");
for(i=0;i<j;i++)
{
printf("%d ",arr2[i]);
}
printf("\nThe Odd elements are :\n");
for(i=0;i<k;i++)
{
printf("%d ", arr3[i]);
}
printf("\n\n");
}
P-7 Write a program in C to delete an element at a desired position from an array.
Code-
#include <stdio.h>
void main(){
int arr1[50],i,pos,n;
printf("Input the size of array : ");
scanf("%d", &n);
printf("Input %d elements in the array in ascending order:\n",n);
for(i=0;i<n;i++)
{
printf("element - %d : ",i);
scanf("%d",&arr1[i]);
}
printf("\nInput the position where to delete: ");
scanf("%d",&pos);
i=0;
while(i!=pos-1)
i++;
while(i<n){
arr1[i]=arr1[i+1];
i++;
}
n--;
printf("\nThe new list is : ");
for(i=0;i<n;i++)
{
printf(" %d",arr1[i]);
}
printf("\n\n");
}
Output-
P-8 - Write a program in C for a 2D array of size 3x3 and print the matrix.
Code-
#include <stdio.h>
void main()
{
int arr1[3][3],i,j;
printf("Input elements in the matrix :\n");
for(i=0;i<3;i++)
{
for(j=0;j<3;j++)
{
printf("element - [%d],[%d] : ",i,j);
scanf("%d",&arr1[i][j]);
}
}
printf("\nThe matrix is : \n");
for(i=0;i<3;i++)
{
printf("\n");
for(j=0;j<3;j++)
printf("%d\t",arr1[i][j]);
}
printf("\n\n");
}
P-9 - Write a program in C for adding two matrices of the same size.
Code-
#include <stdio.h>
void main()
{
int arr1[50][50],brr1[50][50],crr1[50][50],i,j,n;
printf("Input the size of the square matrix (less than 5): ");
scanf("%d", &n);
printf("Input elements in the first matrix :\n");
for(i=0;i<n;i++)
{
for(j=0;j<n;j++)
{
printf("element - [%d],[%d] : ",i,j);
scanf("%d",&arr1[i][j]);
}
}
printf("Input elements in the second matrix :\n");
for(i=0;i<n;i++)
{
for(j=0;j<n;j++)
{
printf("element - [%d],[%d] : ",i,j);
scanf("%d",&brr1[i][j]);
}
}
printf("\nThe First matrix is :\n");
for(i=0;i<n;i++)
{
printf("\n");
for(j=0;j<n;j++)
printf("%d\t",arr1[i][j]);
}
printf("\nThe Second matrix is :\n");
for(i=0;i<n;i++)
{
printf("\n");
for(j=0;j<n;j++)
printf("%d\t",brr1[i][j]);
}
for(i=0;i<n;i++)
for(j=0;j<n;j++)
crr1[i][j]=arr1[i][j]+brr1[i][j];
printf("\nThe Addition of two matrix is : \n");
for(i=0;i<n;i++){
printf("\n");
for(j=0;j<n;j++)
printf("%d\t",crr1[i][j]);
}
printf("\n\n");
}
P-10 - 10. Write a program in C for the multiplication of two square matrices.
Code-
#include <stdio.h>
void main()
{
int arr1[50][50],brr1[50][50],crr1[50][50],i,j,k,r1,c1,r2,c2,sum=0;
printf("\nInput the rows and columns of first matrix : ");
scanf("%d %d",&r1,&c1);
printf("\nInput the rows and columns of second matrix : ");
scanf("%d %d",&r2,&c2);
if(c1!=r2){
printf("Mutiplication of Matrix is not possible.");
printf("\nColumn of first matrix and row of second matrix must be same.");
}
else
{
printf("Input elements in the first matrix :\n");
for(i=0;i<r1;i++)
{
for(j=0;j<c1;j++)
{
printf("element - [%d],[%d] : ",i,j);
scanf("%d",&arr1[i][j]);
}
}
printf("Input elements in the second matrix :\n");
for(i=0;i<r2;i++)
{
for(j=0;j<c2;j++)
{
printf("element - [%d],[%d] : ",i,j);
scanf("%d",&brr1[i][j]);
}
}
printf("\nThe First matrix is :\n");
for(i=0;i<r1;i++)
{
printf("\n");
for(j=0;j<c1;j++)
printf("%d\t",arr1[i][j]);
}
printf("\nThe Second matrix is :\n");
for(i=0;i<r2;i++)
{
printf("\n");
for(j=0;j<c2;j++)
printf("%d\t",brr1[i][j]);
}
for(i=0;i<r1;i++)
for(j=0;j<c2;j++)
crr1[i][j]=0;
for(i=0;i<r1;i++)
{
for(j=0;j<c2;j++)
{
sum=0;
for(k=0;k<c1;k++)
sum=sum+arr1[i][k]*brr1[k][j];
crr1[i][j]=sum;
}
}
printf("\nThe multiplication of two matrices is : \n");
for(i=0;i<r1;i++)
{
printf("\n");
for(j=0;j<c2;j++)
{
printf("%d\t",crr1[i][j]);
}
}
}
printf("\n\n");
}
P-11 - Write a program in C to find the sum of the right diagonals of a matrix.
Code-
#include <stdio.h>
void main()
{
int i,j,arr1[50][50],sum=0,n;
printf("Input the size of the square matrix : ");
scanf("%d", &n);
printf("Input elements in the first matrix :\n");
for(i=0;i<n;i++)
{
for(j=0;j<n;j++)
{
printf("element - [%d],[%d] : ",i,j);
scanf("%d",&arr1[i][j]);
if (i==j) sum= sum+arr1[i][j];
}
}
printf("The matrix is :\n");
for(i=0;i<n;i++)
{
for(j=0;j<n ;j++)
printf("% 4d",arr1[i][j]);
printf("\n");
}
printf("Addition of the right Diagonal elements is :%d\n",sum);
}
P-12- 12. Write a program in C to find the sum of rows and columns of a matrix.
Code-
#include <stdio.h>
void main()
{
int i,j,k,arr1[10][10],rsum[10],csum[10],n;
printf("Input the size of the square matrix : ");
scanf("%d", &n);
printf("Input elements in the first matrix :\n");
for(i=0;i<n;i++)
{
for(j=0;j<n;j++)
{
printf("element - [%d],[%d] : ",i,j);
scanf("%d",&arr1[i][j]);
}
}
printf("The matrix is :\n");
for(i=0;i<n;i++)
{
for(j=0;j<n ;j++)
printf("% 4d",arr1[i][j]);
printf("\n");
}
for(i=0;i<n;i++)
{
rsum[i]=0;
for(j=0;j<n;j++)
rsum[i]=rsum[i]+arr1[i][j];
}
for(i=0;i<n;i++)
{
csum[i]=0;
for(j=0;j<n;j++)
csum[i]=csum[i]+arr1[j][i];
}
printf("The sum or rows and columns of the matrix is :\n");
for(i=0;i<n;i++)
{
for(j=0;j<n;j++)
printf("% 4d",arr1[i][j]);
printf("% 8d",rsum[i]);
printf("\n");
}
printf("\n");
for(j=0;j<n;j++)
{
printf("% 4d",csum[j]);
}
printf("\n\n");
}
