'commit'

TangDou/LuoGuBook/P1307_3.cpp

@@ -0,0 +1,30 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+int n;
+const int N = 15;
+int b[N], idx;
+
+int main() {
+    cin >> n;
+    //特判
+    if (n == 0) {
+        printf("0");
+        exit(0);
+    }
+    //如果是负数，输出负号
+    if (n < 0) n = -n, printf("-");
+    //数位分离
+    while (n) {
+        int a = n % 10;
+        n /= 10;
+        b[idx++] = a;
+    }
+    //下标
+    int i = 0;
+    //去掉前导0
+    while (!b[i]) i++;
+    //输出
+    for (; i < idx; i++)cout << b[i];
+    return 0;
+}