default parameters

This program is used to learn the default parameters
feihun1 · Apr 1, 2017 · b18bfe0 · b18bfe0
1 parent 156ac46
commit b18bfe0
Showing 1 changed file with 32 additions and 0 deletions.
diff --git a/cpp five.hpp b/cpp five.hpp
@@ -0,0 +1,32 @@
+//The use of the default parameters
+#include <iostream>
+using namespace std;
+char * spy(char *p, int i = 1);
+char * spy(char *p, int i)
+{
+	char *q = new char[i+1];
+	int a;
+	for ( a = 0; a < i&&p[a]; a++)
+	{
+		q[a] = p[a];
+	}
+	while (a<=i)
+	{
+		q[a++] = '\0';
+	}
+	return q;
+}
+int main()
+{
+	char sth[10];
+	cin.get(sth, 10);
+	cin.get();
+	char *p=spy(sth, 3);
+	cout << p << endl;
+	delete[]p;
+	p=spy(sth);
+	cout << p << endl;
+	delete[]p;
+	cin.get();
+    return 0;
+}