Fiz desse jeito aki e funfou, quem quiser pode usar o codigo   #include <iostream>
using namespace std;
int multiplica(int m[][6], int m2[][6], int t){
    int i, j, l1=m[0][5], l2=m[1][4], l3=m[2][3], l4=m[3][2], l5=m[4][1], l6=m[5][0];
    for (i=0; i<6; i++){
        m2[0][i]*=l1;
    }for (i=0; i<6; i++){
        m2[1][i]*=l2;
    }for (i=0; i<6; i++){
        m2[2][i]*=l3;
    }for (i=0; i<6; i++){
        m2[3][i]*=l4;
    }for (i=0; i<6; i++){
        m2[4][i]*=l5;
    }for (i=0; i<6; i++){
        m2[5][i]*=l6;
    }
cout<<"A matriz convertida é\n\n\n";
for (i=0; i<t; i++){
    for (j=0; j<6; j++){
        cout<<m2[i][j]<<"\t";
    }
    cout<<"\n";
}
return t;
}
int main (){
    int i, j, mat1[6][6], mat2[6][6];
    for (i=0; i<6; i++){
        for (j=0; j<6; j++){
            cout<<"Digite o elemento linha  "<<i+1<<", coluna  "<<j+1<<"  da matriz\t";
            cin>>mat1[i][j];
            mat2[i][j]=mat1[i][j];
        }
    }
   multiplica (mat1, mat2, 6);
system ("pause>null");
return 0;
}