'commit'

GESP/Level4/GESP202309/test.cpp

@@ -0,0 +1,61 @@
+#include <bits/stdc++.h>
+using namespace std;
+const int N = 110;
+int a[N], al;
+string s[N];
+int sl;
+
+// 2进制转16进制  0011 1100
+char get(string x) { // x 必须是4位一组的01数字  --> E  B   A
+  int sum = 0;
+  int base = 1;
+  for (int i = x.size() - 1; i >= 0; i--) {
+    sum += (x[i] - '0') * base;
+    base *= 2;
+  }
+  if (sum >= 10)
+    return (char)(sum - 10 + 'A');
+  return (char)(sum + '0');
+}
+
+// x=0000 0111
+// 0E
+string getHex(string x) {    // 0E FE AC
+  string a = x.substr(0, 4); // 前4个
+  string b = x.substr(4, 4); // 后4个
+  string c;
+  c.push_back(get(a));
+  c.push_back(get(b));
+  return c;
+}
+
+int main() {
+  long long n = 987654321012345678;
+  while (n) {
+    int x = n % 2;
+    n /= 2;
+    a[++al] = x;
+  }
+  // 需要添加若干0来完成补位，需要添加多少个？
+  int x = 7 - al % 7;
+  if (al % 7 == 0)
+    x = 0;
+  al += x;
+
+  for (int i = al; i >= 1; i -= 7) { // 每一组
+    string q = "";
+    if (i == 7)
+      q = q + "1";
+    else
+      q = q + "0";
+    for (int j = 0; j < 7; j++) // 每一个
+      q = q + to_string(a[i - j]);
+
+    s[++sl] = q;
+  }
+
+  for (int i = sl; i; i--)
+    cout << getHex(s[i]) << " ";
+
+  return 0;
+}