C++, please help me find and fix the bug. It's supposed to set all permutations of a string. Thank you.

Computer Networking: A Top-Down Approach (7th Edition)
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Author:James Kurose, Keith Ross
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Chapter1: Computer Networks And The Internet
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C++, please help me find and fix the bug. It's
supposed to set all permutations of a string.
Thank you.
set<string> variations(string z) {
set<string> response;
if (z.length() == 0) {
return response;
}
for (int i = 0; i < z.length(); i++) {
string pause = z.substr(0, i) + z.substr(i + 1);
set<string> suffixes = variations(pause);
for (string x: suffixes) {
response.insert(z[i] + x);
}
return response;
}
Transcribed Image Text:C++, please help me find and fix the bug. It's supposed to set all permutations of a string. Thank you. set<string> variations(string z) { set<string> response; if (z.length() == 0) { return response; } for (int i = 0; i < z.length(); i++) { string pause = z.substr(0, i) + z.substr(i + 1); set<string> suffixes = variations(pause); for (string x: suffixes) { response.insert(z[i] + x); } return response; }
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