Jednacine

#include <iostream>
#include <cmath>

using namespace std;

float detM(float A[15][15] , int n) {
    float sum(0), t[15][15];
    if ( n == 1 ) return A[0][0];
    if( n == 2 ) return A[0][0]*A[1][1] - A[0][1]*A[1][0];

    for(int p=0; p<n; p++) {
        int h = 0,k = 0;
        for(int i=1 ; i<n ; i++ ) {
            for(int j=0 ; j<n ; j++) {
                if( j == p ) continue;
                t[h][k] = A[i][j];
                k++;
                if( k == n-1 ) {
                    h++;
                    k = 0;
                }

            }
        }

        sum += A[0][p]*pow(-1,p)*detM(t,n-1);
    }
 return sum;
}

void upisM(float (&A)[15][15] , int n) {
    for ( int i=0 ; i<n ; i++ ) {
        for ( int j=0 ; j<n ; j++ ) {
            cout<<"A["<<i+1<<"]["<<j+1<<"]=";
            cin>>A[i][j];
        }
    }
}

void upisV(float (&b)[15] , int n) {
    for ( int i=0 ; i<n ; i++ ) {
            cout<<"b["<<i+1<<"]=";
            cin>>b[i];
    }
}

void menjaj(int n , int q , float (&A)[15][15] , float (&b)[15] ) {
    float tmp;
    for ( int i=0 ; i<n ; i++ ) {
        tmp = A[i][q];
        A[i][q] = b[i];
        b[i] = tmp;
    }
}


int main()
{
    int n;
    float A[15][15] , b[15] , x[15] , detS , detX;

    cout<<"Unesite red matrice:"<<endl;
    cin>>n;

    upisM(A , n);

    upisV(b , n);

    detS = detM(A , n);

    if ( detS == 0 ) cout<<"Sistem nema konacna resenja"<<endl;
    else {
        for ( int i=0 ; i<n ; i++ ) {
            menjaj(n , i , A , b);
            detX = detM(A , n);
            x[i] = detX / detS ;
            menjaj(n , i , A , b);
            cout<<"x["<<i+1<<"]="<<x[i]<<endl;
        }
    }
    return 0;
}