Wed, 06 Mar 2019 13:42:26 +0800

.vscode/launch.json

@@ -20,7 +20,7 @@
             "stopAtEntry": false,
             "cwd": "${workspaceFolder}",
             "environment": [],
-            "externalConsole": false,
+            "externalConsole": true,
             "MIMode": "gdb",
             "setupCommands": [
                 {

lanqiao/PREV/PREV-55.cpp

@@ -2,7 +2,116 @@
 #define _SILENCE_CXX17_C_HEADER_DEPRECATION_WARNING
 #include <bits/stdc++.h>
 using namespace std;
+char line[1 << 10 | 1], buf[1 << 10 | 1], lastop[10];
+int mp[1 << 8];
+void init()
+{
+    for (char ch = '0'; ch <= '9'; ch++)
+        mp[ch] = ch - '0';
+    for (char ch = 'A'; ch <= 'Z'; ch++)
+        mp[ch] = ch - 'A' + 10;
+    for (char ch = 'a'; ch <= 'z'; ch++)
+        mp[ch] = ch - 'a' + 10;
+    for (int i = 0; i <= 9; i++)
+        mp[i] = i + '0';
+    for (int i = 10; i <= 35; i++)
+        mp[i] = i - 10 + 'A';
+}
+long long atoi(const char *str, int radix)
+{
+    long long ret = 0;
+    while (*str)
+        ret = ret * radix + mp[*str++];
+    return ret;
+}
+void itoa(long long val, char *str, int radix)
+{
+    int len = 0;
+    for (; val; val /= radix)
+        str[len++] = mp[val % radix];
+    str[len] = 0;
+    for (char *p1 = str, *p2 = str + len; p1 < p2;)
+        swap(*p1++, *--p2);
+}
 int main()
 {
+    init();
+    int n, curBase = 10;
+    long long curNum = 0;
+    scanf("%d", &n);
+    while (n--)
+    {
+        do
+            fgets(line, 1 << 10 | 1, stdin);
+        while (strlen(line) < 3);
+        do
+        {
+            if (memcmp(line, "NUM", 3) == 0)
+            {
+                sscanf(line, "%*s%s", buf);
+                long long val = atoi(buf, curBase);
+                do
+                {
+                    if (memcmp(lastop, "RST", 3) == 0)
+                    {
+                        curNum = val;
+                        break;
+                    }
+                    if (memcmp(lastop, "ADD", 3) == 0)
+                    {
+                        curNum += val;
+                        break;
+                    }
+                    if (memcmp(lastop, "SUB", 3) == 0)
+                    {
+                        curNum -= val;
+                        break;
+                    }
+                    if (memcmp(lastop, "MUL", 3) == 0)
+                    {
+                        curNum *= val;
+                        break;
+                    }
+                    if (memcmp(lastop, "DIV", 3) == 0)
+                    {
+                        curNum /= val;
+                        break;
+                    }
+                    if (memcmp(lastop, "MOD", 3) == 0)
+                    {
+                        curNum %= val;
+                        break;
+                    }
+                } while (false);
+                break;
+            }
+            if (memcmp(line, "ADD", 3) == 0 ||
+                memcmp(line, "SUB", 3) == 0 ||
+                memcmp(line, "MUL", 3) == 0 ||
+                memcmp(line, "DIV", 3) == 0 ||
+                memcmp(line, "MOD", 3) == 0)
+            {
+                sscanf(line, "%s", lastop);
+                break;
+            }
+            if (memcmp(line, "CHANGE", 6) == 0)
+            {
+                sscanf(line, "%*s%s", buf);
+                curBase = atoi(buf, 10);
+                break;
+            }
+            if (memcmp(line, "EQUAL", 5) == 0)
+            {
+                itoa(curNum, buf, curBase);
+                puts(buf);
+                break;
+            }
+            if (memcmp(line, "CLEAR", 5) == 0)
+            {
+                strcpy(lastop, "RST");
+                break;
+            }
+        } while (false);
+    }
     return 0;
 }