The third character of A, B, B, c, d, e cannot be all combinations of E;

Idea: Use the arrangement idea for recursion;
# Include "iostream" using namespace STD; char B [10]; void pick_one (char a [], int num [], int N) {If (n = 6) {B [N] = '\ 0'; cout <B <Endl; return;} For (INT I = 0; I <5; I ++) {If (n = 2 & A [I] = 'E') continue; else {If (Num [I]! = 0) {B [N] = A [I]; num [I] --; pick_one (A, num, n + 1 ); num [I] ++ ;}}} void main () {char a [] = {'A', 'B', 'C', 'D ', 'E'}; int num [] = {1, 1, 1}; pick_one (A, num, 0 );}

 

The third character of A, B, B, c, d, e cannot be all combinations of E;