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couttest.cpp

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+#include <iostream>
+int main()
+{
+	using namespace std;
+	//×Ö·ûʹÓõ¥ÒýºÅ
+	char ch = 'M';
+	cout<<ch;
+	cin.get();
+	return 0;
+
+}

file.txt

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+dsdad
+sddsdga
+3134@da
+dsd

prog1.cpp

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+#include <iostream>
+int main()
+{
+	using namespace std;
+	cout << "Come up and C++ me some time.";
+	cout << endl;
+	cout << "You won't regret it!" << endl;
+	cin.get();
+	return 0;
+
+}

prog2.cpp

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+#include <iostream>
+int main()
+{
+	int carrots;
+
+	carrots=25;
+	std::cout<<"I have ";
+	std::cout<<carrots;
+	std::cout<<" carrots.";
+	std::cout<<std::endl;
+	carrots=carrots-1;
+	std::cout<<"Crunch,crunch.Now I have "<<carrots<<" carrots."<<std::endl;
+	return 0;
+}

prog3.cpp

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+#include <iostream>
+int main()
+{
+	int carrots;
+
+	std::cout<<"How many carrots do you have?"<<std::endl;
+	std::cin>>carrots;
+	std::cout<<" Here are two more.";
+	carrots=carrots+2;
+
+	std::cout<<"Now you have "<<carrots<<" carrots."<<std::endl;
+
+	std::cin.get();
+
+	return 0;
+
+}

prog4.cpp

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+#include <iostream>
+#include <cmath>
+
+int main()
+{
+	using namespace std;
+
+	double area;
+	double side;
+
+	cout<<"Enter the floor area,in square feet,of your home:";
+	cin>>area;
+	side=sqrt(area);
+	cout<<"That's the equivalent of a square "<<side
+		<<" feet to the side."<<endl;
+	cout<<"How fascinating!"<<endl;
+	cin.get();
+	return 0;
+}

zhuanyizifu.cpp

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+#include <iostream>
+using namespace std;
+int main()
+{
+	//'\a'·¢³öÉùÏì
+	char alarm='\a';
+	cout<<alarm<<"Don't do that again!\a\n";
+	cout<<"Ben \"Buggsie\" Hacker\nwas here!\n";
+	cin.get();
+	return 0;
+}