c_cpp 生成数组的所有子集

Posted 2021-05-14

#include <iostream>
using namespace std;

int main() {
    char a[]= {'a','b','c','d'};
    int n=4;
    for (int i=0; i<(1<<n);i++) {
        for (int j=0;j<n;j++)
            if (i&(1<<j))
                cout<< a[j]<< " ";
        cout<< endl;
    }
}