hpw do i edit this program in c++ to generate the statistics for each combination of characters, stating how many times it appears in the matrix.

1 #include 2 #include ctme> 3 #includecstdlib> 4 5 using namespace std; 6 7 int main() t 8 char rna[4] {A', 9 char rstring[16]; 'c','G', 'T'); 10 srand (time (NULL)): 12 13 14 15 16 17 18.. 19 20 21 int n; cout > n; int i -e; while(i