'commit'

C++课程/第十四课位运算训练精讲/p164.cpp

@@ -0,0 +1,15 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	int a, b, c, d;
+	cin >> a >> b;
+	do {
+		c = a ^ b;
+		d = (a & b) << 1;
+		a = c;
+		b = d;
+	} while (b != 0);
+	cout << a;
+	return 0;
+}

C++课程/第十四课位运算训练精讲/p164_2.cpp

@@ -0,0 +1,11 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	int n = 0, x;
+	cin >> x;
+	for (n = 0; x != 0; x &= x - 1)
+		n++;
+	cout << n;
+	return 0;
+}

C++课程/第十四课位运算训练精讲/p164_3.cpp

@@ -0,0 +1,14 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	int n = 4095;
+	int count = 0;
+	while (n != 0)
+	{
+		count++;
+		n >>= 1;
+	}
+	cout << count;
+	return 0;
+}

C++课程/第十四课位运算训练精讲/p165.cpp

@@ -0,0 +1,20 @@
+#include<bits/stdc++.h>
+using namespace std;
+
+int main() {
+	int a,b,c,d,e,f;
+	cin>>a>>b;
+	c=a&b;
+	d=a^b;
+	while(c)
+	{
+		e=d;
+		f=c<<1;
+		c=e&f;
+		d=e^f;
+	}
+	cout<<d;
+	return 0;
+}
+
+

C++课程/第十四课位运算训练精讲/x&(x-1).cpp

@@ -0,0 +1,19 @@
+#include<bits/stdc++.h>
+//https://blog.csdn.net/sandwichsauce/article/details/79847953
+using namespace std;
+int func(int x)
+{
+   int count = 0;
+   while (x)
+   {
+     count++;
+     x = x&(x - 1);
+   }
+  return count;
+}
+int main()
+{
+  cout << func(2048) << endl;
+  return 0;
+} 
+

C++课程/第十四课位运算训练精讲/异或交换两个数.cpp

@@ -0,0 +1,12 @@
+#include<bits/stdc++.h>
+using namespace std;
+
+int main(){
+    int a=12,b=34,temp;
+    printf("Original result: a=%d,b=%d\n",a,b);
+    temp=a^b;
+    a=temp^a;
+    b=temp^b;
+    printf("Transformed result: a=%d,b=%d\n",a,b);
+    return 0;
+}

C++课程/第十四课位运算训练精讲/异或交换两个数_加法.cpp

@@ -0,0 +1,12 @@
+#include<bits/stdc++.h>
+using namespace std;
+
+int main()
+{
+    int a = 5, b = 5;
+    printf("a=%d b=%d\n", a, b);
+    a = a ^ b;
+    b = a ^ b;
+    a = a ^ b;
+    printf("a=%d b=%d\n", a, b);
+}

C++课程/第十四课位运算训练精讲/快速幂.cpp

@@ -0,0 +1,29 @@
+#include<iostream>
+#include <bitset>
+using namespace std;
+
+//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
+void printEr(int b) {
+	cout<<bitset<sizeof(b)*2>(b)<<endl;
+}
+//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
+int poww(int a, int b) {
+	int ans = 1, base = a;
+	while (b >0) {
+		//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƶ<EFBFBD>b
+		printEr(b);
+		//<2F><><EFBFBD><EFBFBD><EFBFBD>ݵĺ<DDB5><C4BA><EFBFBD><EFBFBD>㷨
+		if (b & 1)  //<2F><><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD><EFBFBD> & 1 <20>Ľ<EFBFBD><C4BD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD><C8A1><EFBFBD><EFBFBD><EFBFBD>Ƶ<EFBFBD><C6B5><EFBFBD>ĩλ<C4A9><CEBB><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һλ<D2BB><CEBB><EFBFBD><EFBFBD><EFBFBD><EFBFBD>1<EFBFBD><31><EFBFBD><EFBFBD>ʾ<EFBFBD><CABE><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><D2AA><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><D2BB>
+			ans *= base;
+		base *= base;
+		//<2F><><EFBFBD><EFBFBD>һλ<D2BB><CEBB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><CEAA><EFBFBD><EFBFBD>2
+		b >>= 1;
+	}
+	return ans;
+}
+
+int main() {
+	cout << poww(2,5);
+
+	return 0;
+}

C++课程/第十四课位运算训练精讲/快速幂_2.cpp

@@ -0,0 +1,25 @@
+#include<bits/stdc++.h>
+using namespace std;
+
+int quick(int a,int b)
+{
+    int s = 1;
+    while (b > 0) {
+        if (b & 1) {//b=b>>1<><31>֤<EFBFBD><D6A4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD>϶<EFBFBD><CFB6><EFBFBD>ִ<EFBFBD>и<EFBFBD>if<69>ж<EFBFBD>
+            s = s * a;		
+           }
+        a = a * a;
+        cout<<"b="<<b<<endl;
+		cout<<"s="<<s<<endl;
+		cout<<endl;
+        b = b >> 1;
+	}
+    return s;
+}
+
+int main() {
+	printf("%d",quick(2,10));
+	return 0;
+}
+
+