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Print the corner elements and their sum in a 2-D matrix in C Program.
Given an array of size 2X2 and the challenge is to print the sum of all the corner elements stored in an array.
Assume a matrix mat[r][c], with some row “r” and column “c” starting row and column from 0, then its corner elements will be; mat[0][0], mat[0][c-1], mat[r-1][0], mat[r-1][c-1]. Now the task is to get these corner elements and sum those corner elements i.e., mat[0][0] + mat[0][c-1] + mat[r-1][0] + mat[r-1][c-1], and print the result on the screen.
Example
Input: Enter the matrix elements : 10 2 10 2 3 4 10 4 10 Output: sum of matrix is : 40
Algorithm
START Step 1-> create macro for rows and column as #define row 3 and #define col 3 Step 2 -> main() Declare int sum=0 and array as a[row][col] and variables int i,j,n Loop For i=0 and i<3 and i++ Loop For j=0 and j<3 and j++ Input a[i][j] End End Print [0][0] + a[0][row-1] +a[col-1][0] + a[col-1][row-1] STOP
Example
#include<stdio.h>
#define row 3
#define col 3
int main(){
int sum=0,a[row][col],i,j,n;
printf("Enter the matrix elements : ");
for(i=0;i<3;i++){
for(j=0;j<3;j++){
scanf("%d",&a[i][j]);
}
}
printf("sum of matrix is : %d",a[0][0] + a[0][row-1] +a[col-1][0] + a[col-1][row-1] );
return 0;
}Output
if we run above program then it will generate following output
Enter the matrix elements : 10 2 10 2 3 4 10 4 10 sum of matrix is : 40
Updated on: 22-Aug-2019
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