C++ Programming Code Examples C++ > Computer Graphics Code Examples C++ Program to Find Inverse of a Graph Matrix C++ Program to Find Inverse of a Graph Matrix This C++ program displays the Gauss Jordan method of computing inverse of a matrix. Gauss Jordan method proceeds with row by row reduction of matrix to unit matrix column-wise. #include<iostream> #include<conio.h> #include<stdio.h> using namespace std; int main() { int i, j, k, n; float a[10][10] = {0},d; cout<<"Enter the order of matrix "; cin>>n; cout<<"Enter the elements\n"; for (i = 1; i <= n; i++) { for (j = 1; j <= n; j++) { cin>>a[i][j]; } } for (i = 1; i <= n; i++) { for (j = 1; j <= 2 * n; j++) { if (j == (i + n)) { a[i][j] = 1; } } } for (i = n; i > 1; i--) { if (a[i-1][1] < a[i][1]) { for(j = 1; j <= n * 2; j++) { d = a[i][j]; a[i][j] = a[i-1][j]; a[i-1][j] = d; } } } cout<<"Augmented Matrix: "<<endl; for (i = 1; i <= n; i++) { for (j = 1; j <= n * 2; j++) { cout<<a[i][j]<<" "; } cout<<endl; } for (i = 1; i <= n; i++) { for (j = 1; j <= n * 2; j++) { if (j != i) { d = a[j][i] / a[i][i]; for (k = 1; k <= n * 2; k++) { a[j][k] = a[j][k] - (a[i][k] * d); } } } } for (i = 1; i <= n; i++) { d=a[i][i]; for (j = 1; j <= n * 2; j++) { a[i][j] = a[i][j] / d; } } cout<<"Inverse Matrix "<<endl; for (i = 1; i <= n; i++) { for (j = n + 1; j <= n * 2; j++) { cout<<a[i][j]<<" "; } cout<<endl; } getch(); }