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用指针交换两个数

23a.cpp

@@ -0,0 +1,17 @@
+#include<iostream>
+using namespace std;
+int main(){
+	int * ptr_a, * ptr_b,temp;
+	ptr_a = new int;
+	ptr_b = new int;
+	cout<<"请输入*ptr_a的值:";
+        cin>>*ptr_a;
+	cout<<"请输入*ptr_b的值:";
+	cin>>*ptr_b;
+        temp=*ptr_a;
+        *ptr_a=*ptr_b;
+	*ptr_b=temp;
+	cout<<*ptr_a<<"  "<<*ptr_b<<endl;
+	delete ptr_a,ptr_b;
+	return 0;
+}