public static ss_matrix operator -(ss_matrix TEMP1, ss_matrix TEMP2)
{
//Addition mathematical rules: rows and cols value is same
if (TEMP1.rownumber != TEMP2.rownumber || TEMP1.colnumber != TEMP2.colnumber)
{//handle only part of null matrix situation
string message = "Operation fail: can not use '-' operator for matrix (" + TEMP1.rownumber + " x " + TEMP1.colnumber + ") and matrix ("
+ TEMP2.rownumber + " x " + TEMP2.colnumber + ")";
throw new System.Exception(message);
}
if (TEMP1 == null || TEMP2 == null)
{//this protect when all of them is null
return null;
}
ss_matrix TEMP3 = new ss_matrix(TEMP1.rownumber, TEMP1.colnumber);
for (int i = 0; i < TEMP1.rownumber; i++)
{
for (int j = 0; j < TEMP1.colnumber; j++)
{
TEMP3[i, j] = TEMP1[i, j] - TEMP2[i, j];
}
}
return TEMP3;
}
//sor-oszlop elteres kivetel, null refderencia kivetel
public static ss_matrix operator *(ss_matrix TEMP1, ss_matrix TEMP2)
{
//Multiplication mathematical rules, first's cols vaule equal the secund's rows value
if (TEMP1 == null || TEMP2 == null)
{//if one of them is null, than solution is null (it is better choose like than at +/- operator)
return null;
}
if( TEMP1.colnumber != TEMP2.rownumber)
{
string message = "Operation fail: can not use '*' operator for matrix (" + TEMP1.rownumber + " x " + TEMP1.colnumber + ") and matrix ("
+ TEMP2.rownumber + " x " + TEMP2.colnumber + ")";
throw new System.Exception(message);
}
ss_matrix TEMP3 = new ss_matrix(TEMP1.rownumber, TEMP2.colnumber);
for (int i = 0; i < TEMP1.rownumber; i++)
{
for (int j = 0; j < TEMP2.colnumber; j++)
{
for (int k = 0; k < TEMP1.colnumber; k++)
{
TEMP3[i, j] += TEMP1[i, k] * TEMP2[k, j];
}
}
}
return TEMP3;
}
