12345678910111213141516171819202122232425262728293031 |
- #include <stdio.h>
- // 函数声明:将一个正整数的各位数字逆序返回
- int InvertSequence(int num) {
- int reversed = 0;
- while (num > 0) {
- reversed = reversed * 10 + num % 10;
- num /= 10;
- }
- return reversed;
- }
- // 函数声明:判断一个整数是否为回文数
- int loop(int x) {
- int reversed = InvertSequence(x);
- return x == reversed;
- }
- int main() {
- int a, b, i;
- scanf("%d %d", &a, &b);
- // 输出范围[a, b]之间的所有回文数
- for (i = a; i <= b; ++i) {
- if (loop(i)) {
- printf("%d\n", i);
- }
- }
- return 0;
- }
|