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#include <iostream>
#include <fstream>
#include <vector>
#include <string>
#include <algorithm>
#include <cstring>
#include <cctype>
#include <sys/time.h>
using namespace std;
int main(int argc, char **argv) {
if (argc != 2 && argc != 3) {
cout << "Usage: " << argv[0] << " <abbreviation> [number of answers]" << endl;
return 1;
}
char *abbr = argv[1];
int abbrlen = strlen(abbr);
transform(abbr, abbr+abbrlen, abbr, ::tolower);
for (int i = 0; i < abbrlen; i++) {
if (abbr[i] < 'a' || abbr[i] > 'z') {
cout << "Abbreviation cannot contain '" << abbr[i] << "'!" << endl;
return 1;
}
}
struct timeval tv;
gettimeofday(&tv, NULL);
srand(1000000 * tv.tv_sec + tv.tv_usec);
int numanswers = 1;
if (argc == 3) {
numanswers = strtol(argv[2], nullptr, 10);
if (numanswers <= 0) return 0;
}
vector<string> dict[26];
ifstream dictfile("/usr/share/dict/words");
string line;
while (getline(dictfile, line)) {
transform(line.begin(), line.end(), line.begin(), ::tolower);
if (line[0] >= 'a' && line[0] <= 'z' && all_of(line.begin(), line.end(), ::islower))
dict[line[0] - 'a'].push_back(line);
}
while (numanswers --> 0) {
for (int i = 0; i < abbrlen; i++) {
if (i > 0) cout << ' ';
size_t index = rand() % dict[abbr[i] - 'a'].size();
cout << dict[abbr[i] - 'a'][index];
}
cout << '\n';
}
cout.flush();
return 0;
}
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