
在本节中,我们将看到如何生成任意长度的所有可能字符串,这将采用每个字符的组合来生成字符串。例如,如果字符串是ABC,则它将生成 – {A,B,C,AB,BA,BC,CB,CA,AC,ABC,ACB,BAC,BCA,CAB,CBA}
让我们看一个例子来理解。
算法
printAllString(str)
Begin n := length of the string str count is 2^n – 1 for each number 0 to count, do sub_str := empty string for j in range 0 to n, do if jth bit of the counter is set, then concatenate jth character of str with sub_str end if done repeat: print sub_string until next permutation of sub_string is not completed doneEnd
示例
#include #include #include using namespace std;void printAllString(string str) { int n = str.size(); unsigned int count = pow(2, n); for (int counter = 1; counter <count; counter++) { //generate 2^n - 1 strings string subs = ""; for (int j = 0; j < n; j++) { if (counter & (1<<j)) //when the jth bit is set, then add jth character subs.push_back(str[j]); } do{ cout << subs << endl; } while (next_permutation(subs.begin(), subs.end())); }}
输出
ABABBACACCABCCBABCACBBACBCACABCBADADDABDDBABDADBBADBDADABDBACDDCACDADCCADCDADACDCABCDBDCCBDCDBDBCDCBABCDABDCACBDACDBADBCADCBBACDBADCBCADBCDABDACBDCACABDCADBCBADCBDACDABCDBADABCDACBDBACDBCADCABDCBA
以上就是给定一个字符串,将其组成的所有可能长度的字符串都列出来的详细内容,更多请关注创想鸟其它相关文章!
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