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;
}