'commit'

TangDou/LuoGuBook/第8章模拟与高精度/P1303.cpp

@@ -0,0 +1,34 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+/**
+ * 功能：高精度乘低精度模板
+ * @param A
+ * @param b
+ * @return
+ */
+vector<int> mul(vector<int> &A, int b) {
+    vector<int> C;
+    int t = 0;
+    for (int i = 0; i < A.size() || t; i++) {
+        if (i < A.size()) t += A[i] * b;
+        C.push_back(t % 10);
+        t /= 10;
+    }
+    while (C.size() > 1 && C.back() == 0) C.pop_back();
+    return C;
+}
+
+int main() {
+    string a;
+    int b;
+    vector<int> A, C;
+    cin >> a >> b;
+    //倒着放的噢~
+    for (int i = a.size() - 1; i >= 0; i--) A.push_back(a[i] - '0');
+    C = mul(A, b);
+    //倒着输出噢~
+    for (int i = C.size() - 1; i >= 0; i--) printf("%d", C[i]);
+    return 0;
+}