public class Demo {
public static void main(String[] args) {
String a = "";
for (int i = 1; i <= 4; i++) {
for (int j = 1; j <= 4; j++) {
if (i == j) {
continue;
}
for (int k = 1; k <= 4; k++) {
if (k == j || k == i) {
continue;
}
a += (i*100 + j*10 + k + " , ");
}
}
}
System.out.print(a);
}
}
每日一练 之 有 1、2、3、4 个数字,能组成多少个互不相同且无重复数字的三位数?都是多少?
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转载自blog.csdn.net/axiba01/article/details/80861473
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