c++ permutation

The C++ code for generating permutations involves using the next_permutation function from the algorithm library. First, the input sequence needs to be sorted in ascending order. Then, the next_permutation function is used to generate the next lexicographically greater permutation of the sequence. This function returns true if a greater permutation exists, and false otherwise. By using a do-while loop, all permutations of the sequence can be generated until the next_permutation function returns false. Each permutation is then printed or stored as required. This process ensures that all possible permutations of the input sequence are generated and processed.