Looping

[angelliefling]

Hi I am creating a loop to check if some elements in what I am working on are related to each other

for(int i = 0 ; i < 4 ; i++)
for(int j = 0 ; j < 4 ; j++)
{
p[i][j] = 0;
for(int l = 0 ;l < 4 ; l++)
for(int m = 0 ;m < 4 ; m++)
p[i][j]+=c2[i][l]*sigmak1[l][m]*sigmak2[m][j]-sigmak1[l][m]*sigmak2[m][j]*c1[i][l];
}

these are matrix elements that i am checking, and my loop works such that the sigmak1 and sigmak2 changes every time it loops. However, this now is already a loop of 16 loops and if i want to add say sigmak3 then my loop will have to contain 64 loops. as there are four possible values that the sigma can take with every loop the number of loops gets times by four.

my question is is it possible to write subroutines in which i can have each loop separately and then call them when i want to compile or am i just going to have to bite my tongue and write the loops over and over, that would be tough considering i want to have up to 25 sigma and i want to check all possible combinations of them.