Array

1. Page No. 1
ARRAY 1D
/*Write a C program which calculate and print sum
and average of elements of an array*/
#include<stdio.h>
int main()
{
int arr[50],n,i,sum=0;
float avg;
printf("enter the no. of elementn");
scanf("%d",&n);
printf("enter elementn");
for(i=0;i<n;i++)
{
scanf("%d",&arr[i]);
}
for(i=0;i<n;i++)
sum=arr[i]+sum;
avg=(float)sum/n;
printf("nElement sum is = %d",sum);
printf("nElement average is = %f",avg);
return 0;
}
/*Write a C Program to print the elements of array
in reverse order*/
#include<stdio.h>
int main()
{
int arr[50],i,n;
printf("Enter size of array : ");
scanf("%d",&n);
printf("Enter elements of array : n");
for(i=0;i<n;i++)
{
scanf("%d",&arr[i]);
}
printf("Array in Reverse Order : ");
for(i=n-1;i>=0;i--)
{
printf("%d ",arr[i]);
}
return 0;
}
/*Write a C program to print elements of an array
greater than average*/
#include<stdio.h>
int main()
{
int ar[10],i,n,s=0,c=0;
float avg;
printf("enter the limit:n");
scanf("%d",&n);
printf("enter the elementsn");
for(i=0;i<n;i++)
{
scanf("%d",&ar[i]);
s=s+ar[i];
}
avg=(float)s/n;
printf("average is %.2f",avg);
for(i=0;i<n;i++)
{
if(ar[i]>avg)
{
printf("n%d is grater than avg",ar[i]);
c++;
}
}
printf("nTotal Elements greater than avg are %d",c);
return 0;
}
/*Write a C Program to store the elements of array
into another array in reverse order*/
#include<stdio.h>
int main()
{
int arr[50],rev[50],i,n,j;
printf("Enter size of array : ");
scanf("%d",&n);
printf("Enter elements of array : n");
for(i=0;i<n;i++)
{
scanf("%d",&arr[i]);
}
j=n-1;
for(i=0;i<n;i++)
{
rev[i]=arr[j--];
}
printf("Array in Reverse Order : ");
for(i=0;i<n;i++)
{
printf("%dt",rev[i]);
}
return 0;
}
/*Write a c Program to search an element in a 1D
array*/
#include<stdio.h>
int main()
{
int arr[50],i,n,key,c=0;

2. Page No. 2
printf("Enter size of array : ");
scanf("%d",&n);
printf("Enter elements of array : n");
for(i=0;i<n;i++)
scanf("%d",&arr[i]);
printf("Enter Element to Be Searched : ");
scanf("%d",&key);
for(i=0;i<n;i++)
{
if(arr[i]==key)
{
printf("Element found at %d
indexn",i);
c++;
}
}
if(c==0)
printf("Element Not Found");
return 0;
}
/*Write a c program to find maximum and minimum
element in 1-D array */
#include<stdio.h>
int main()
{
int arr[50],n,i,min,max;
printf("Enter no. of elements:");
scanf("%d",&n);
printf("Enter %d elements in array",n);
for(i=0;i<n;i++)
{
scanf("%d",&arr[i]);
}
min=max=arr[0];
for(i=0;i<n;i++)
{
if(arr[i]>max)
max=arr[i];
else if(arr[i]<min)
min=arr[i];
}
printf("nThe max element is:%d",min);
printf("nThe min element is:%d",max);
return 0;
}
/*Write a c program to perform sorting on 1-D array
*/
#include<stdio.h>
int main()
{
int arr[50],n,i,j,temp;
printf("Enter no. of elements:");
scanf("%d",&n);
printf("Enter %d elements in array",n);
for(i=0;i<n;i++)
{
scanf("%d",&arr[i]);
}
for(i=0;i<n;i++)
{ for(j=0;j<n-1;j++)
{
if(arr[j]>arr[j+1])
{ temp=arr[j];
arr[j]=arr[j+1];
arr[j+1]=temp;
}
}
}
printf("Array Elements after Sorting");
for(i=0;i<n;i++)
{
printf("n%d",arr[i]);
}
return 0;
}
/* Write a c program to find maximum and minimum
element in 1-D array by sorting technique */
#include<stdio.h>
int main()
{
int arr[50],n,i,j,temp;
printf("Enter no. of elements:");
scanf("%d",&n);
printf("Enter %d elements in array",n);
for(i=0;i<n;i++)
{
scanf("%d",&arr[i]);
}
//sorting array in ascending order
for(i=0;i<n;i++)
{
for(j=0;j<n-1;j++)
{
if(arr[j]>arr[j+1])
{
temp=arr[j];
arr[j]=arr[j+1];
arr[j+1]=temp;
}
}
}
for(i=0;i<n;i++)
{
printf("%d ",arr[i]);
}
printf("nThe maximum element is:%d",arr[n-1]);

3. Page No. 3
printf("nThe minimum element is:%d",arr[0]);
printf("nThe second maximum element
is:%d",arr[n-2]);
printf("nThe second minimum element
is:%d",arr[1]);
return 0;
}

4. Page No. 4
ARRAY-2D
#include<stdio.h>
int main()
{
int row,col, ar[100][100],i,j;
printf("Enter row and column of array : ");
scanf("%d%d",&row,&col);
printf("Enter the elements of arrayn");
for(i=0;i<row;i++)
{
for(j=0;j<col;j++)
{
scanf("%d",&ar[i][j]);
}
}
printf("The elements of arrayn");
for(i=0;i<row;i++)
{
for(j=0;j<col;j++)
{ if(i==j)
printf(" %d ",ar[i][j]);
sum=sum+ ar[i][j];
}
printf("n");
}
return 0;
}
/*Write a c Program to find addition of two 2d
array*/
#include<stdio.h>
int main()
{
int arr1[50][50],arr2[50][50],sum[50][50];
int i,j,r1,r2,c1,c2;
printf("Enter row and column of 1st array : ");
scanf("%d%d",&r1,&c1);
printf("Enter elements of array 1st array: n");
for(i=0;i<r1;i++)
{
for(j=0;j<c1;j++)
{
scanf("%d",&arr1[i][j]);
}
}
printf("Enter row and column of 2nd array : ");
scanf("%d%d",&r2,&c2);
printf("Enter elements of array 2nd array: n");
for(i=0;i<r1;i++)
{
for(j=0;j<c2;j++)
{
scanf("%d",&arr2[i][j]);
}
}
if(r1==r2&&c1==c2)
{
for(i=0;i<r1;i++)
{
for(j=0;j<c1;j++)
{
sum[i][j]=arr1[i][j]+arr2[i][j];
}
}
printf("Sum Of Two Matrices : n");
for(i=0;i<r1;i++)
{
for(j=0;j<c1;j++)
{
printf("%dt",sum[i][j]);
}
printf("n");
}
}
else
printf("Addition Not Possible");
return 0;
}
/*Write a C Program to print the upper and lower
triangle in a matrix*/
#include<conio.h>
#include<stdio.h>
#define row 3
#define col 3
int main()
{
int ar[row][col],i,j,n;
printf("Enter the elements of arrayn");
for(i=0;i<row;i++)
{
for(j=0;j<col;j++)
{
scanf("%d",&ar[i][j]);
}
}
printf("The elements of arrayn");
for(i=0;i<row;i++)
{
for(j=0;j<col;j++)
{
printf(" %d ",ar[i][j]);
}
printf("n");
}
if(row==col)
{
printf("The lower triangular matrixn");
for(i=0;i<row;i++)

5. Page No. 5
{
for(j=0;j<col;j++)
{
if(j<=i)
{
printf(" %d
",ar[i][j]);
}
}
printf("n");
}
printf("The upper triangular matrixn");
for(i=0;i<row;i++)
{
for(j=0;j<col;j++)
{
if(j>=i)
{
printf(" %d ",ar[i][j]);
}
else
{
printf(" ");
}
}
printf("n");
}
}
else
printf("Can't calculate the upper/lower triangle in
matrix");
return 0;
}
/*Write a C Program to find row sum & column sum
*/
#include<stdio.h>
int main()
{
int mat[50][50];
int i,j,r,c,rsum,csum,d1=0,d2=0;
printf("Enter row and column of an array : ");
scanf("%d%d",&r,&c);
printf("Enter elements of array an array: n");
for(i=0;i<r;i++)
{
for(j=0;j<c;j++)
{
scanf("%d",&mat[i][j]);
}
}
//Code to print elements
for(i=0;i<r;i++)
{
for(j=0;j<c;j++)
{
printf(" %d",mat[i][j]);
}
printf("n");
}
//Row sum
for(i=0;i<r;i++)
{
rsum=0;
for(j=0;j<c;j++)
{
rsum=rsum+mat[i][j];
}
printf("Row Sum %dn", rsum);
}
//Column Sum
for(i=0;i<c;i++)
{
csum=0;
for(j=0;j<r;j++)
{
csum=csum+mat[j][i];
}
printf("Column Sum %dn",csum);
}
return 0;
}
//logic for individual right diagonal
for(i=0;i<row;i++)
{
for(j=0;j<col;j++)
{ if(i==j)
{
printf(" %d ",ar[i][j]);
}
Else
{
Printf(“ “);
}
}
printf("n");
}
//logic for individual left diagonal
for(i=0;i<row;i++)
{
for(j=0;j<col;j++)
{ if(i+j=row-1)
{
printf(" %d ",ar[i][j]);
}

6. Page No. 6
Else
{
Printf(“ “);
}
}
printf("n");
}
Write a C Program to add the elements of both
diagonals of a user defined matrix (method 1)
#include<stdio.h>
int main()
{
int n,i,j,r,c,arr[100][100],dsum=0;
printf("Enter the number of rows and columns.");
scanf("%d%d",&r,&c);
if(r==c)
{
for(i=0;i<=r-1;i++)
{
for(j=0;j<=c-1;j++)
{
scanf("%d",&arr[i][j]);
}
}
for(i=0;i<=r-1;i++)
{
for(j=0;j<=c-1;j++)
{
if((i==j)||(i+j==r-1))
{
dsum=dsum+arr[i][j];
}
}
}
printf("The sum of elements of both diagonals is
%d.",dsum);
}
else
{
printf("The sum of diagonals cannot be
calculated.");
}
return 0;
}
Write a C Program to add the elements of both
diagonals of a user defined matrix (method 2)
#include<stdio.h>
int main()
{
int n,i,j,r,c,arr[100][100],dsum=0;
printf("Enter the number of rows and columns.");
scanf("%d%d",&r,&c);
if(r==c)
{
for(i=0;i<=r-1;i++)
{
for(j=0;j<=c-1;j++)
{
scanf("%d",&arr[i][j]);
}
}
for(i=0;i<=r-1;i++)
{
dsum=dsum+arr[i][i];
}
for(i=0;i<=r-1;i++)
{
dsum=dsum+arr[i][r-1-i];
}
printf("The sum of elements of both diagonals is
%d.",dsum);
}
else
{
printf("The sum of diagonals cannot be
calculated.");
}
return 0;
}