Characters in the delete mode string

Delete the characters in the mode string, such as "Welcome to asted" and the mode string is "aeiou". Then, we get "wlcm t STD ".

# Include <iostream> # include <cstring> using namespace STD; char * Re (char * STR, char * Model) {If (STR = NULL | model = NULL) return NULL; int hash [26] = {0}; For (INT I = 0; I <strlen (model); I ++) {++ hash [model [I]-'a'];} Char * address = STR; int Index = 0; For (INT I = 0; I <strlen (STR); I ++) {If (STR [I] = ''| hash [STR [I]-'a'] = 0) {STR [Index] = STR [I]; index ++ ;}} STR [Index] = '\ 0'; return address; //} int main () {char STR [] = "Welcome to asted"; char model [] = "aeiou"; cout <Re (STR, model) <Endl ;}

The time complexity is O (n), and the space complexity is O (1 ).

Characters in the delete mode string