C Program to Calculate the Determinant of 2*2 Matrix

C program to calculate the determinant of 2*2 matrix

#include<stdio.h> #include<conio.h> int main() {           int a[2][2], i, j, d, e, c;           printf("\n Enter elements of 2*2 matrix");           for(i=0;i<2;i++)   // outer loop for taking row input            {                    for(j=0;j<2;j++) // iner loop for taking colume input                    {                              scanf("%d", &a[i][j]);                    }           }           for(i=0;i<2;i++)           {                    for(j=0;j<2;j++)                    {                              c= (a[0][0]*a[1][1]);                              e= (a[0][1]*a[1][0]);                              d=c-e;                    }           }           printf("\n Determinant of 2*2 matrix is %d", d);           getch(); }

Output

Step by step explanation 

The initial value of an array is 0, and the address of a matrix is made as below

Calculation of determinant of a matrix is

a[0][0] * a[1][1] - a[0][1] * a[1][0]

In this output

a[0][0] = 6

a[0][1] = 10

a[1][0] = 5

a[1][1] = 3

The determinant of the matrix in this example is 

c= (a[0][0]*a[1][1]);

c = 6*3

c = 18

and

  e= (a[0][1]*a[1][0]);

e = 10*5

e = 50

so, 

d = c-e

  d= 18-50

  d = -32