C#第一次实验报告

1.Write an application that includes the logic from Exercise 1 (TEXT
BOOK “Beginning Microsoft Visual C# 2008”, Page 67), obtains two numbers from the user, and displays them, but rejects any input where both numbers are greater than 10 and asks for two new numbers.
Key code:
static void Main(string[] args)
{
int n, m;
Console.WriteLine("Enter two integer:");
n = Convert.ToInt32(Console.ReadLine());
m = Convert.ToInt32(Console.ReadLine());
while (n < 10 || m < 10)
{
if (n < 10)
Console.WriteLine("n = {0} greater than 10.", n);
if (m < 10)
Console.WriteLine("m = {0} greater than 10.", m);
Console.WriteLine("Enter two integer:");
n = Convert.ToInt32(Console.ReadLine());
m = Convert.ToInt32(Console.ReadLine());
}
Console.WriteLine("n and m are not greater than 10.\nBye!");
Console.ReadKey();
}
Output:
2.Write an application that display the multiplication table (九九乘法
表).
Keycode:
static void Main(string[] args)
{
for (int i = 1; i <= 9; i++)
{
for (int j = 1; j <= i; j++)
{
Console.Write("{0} * {1} = {2} ",j, i, i * j); }
Console.WriteLine();
}
Console.WriteLine();
Console.ReadKey();
}
Output:
3.Write a console application that accepts a string from the user and
outputs a string with the characters in reverse order.
Keycode:
static void Main(string[] args)
{
string str;
str = Console.ReadLine();
int len = str.Length;
for (int i = len - 1; i >= 0; i--)
{
Console.Write("{0}", str[i]);
}
Console.WriteLine();
Console.ReadKey();
}
Output:
4.Write a console application that accepts a string and replaces all
occurrences of the string no with yes
Keycode:
static void Main(string[] args)
{
string str = Console.ReadLine();
str = str.Replace("no", "yes");
Console.WriteLine(str);
Console.ReadKey();
}
Output:
5.Write a console application that places double quotes around each
word in a string.
Keycode:
static void Main(string[] args)
{
string str = Console.ReadLine();
str = str.Replace(" ", "\" \"");
string s = "\"" + str + "\"";
Console.WriteLine(s);
Console.ReadKey();
}
Output:。