using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using System.IO;
namespace progress2 { public class Problem { public int a, b, c, d,n,sum; char[] s = { '+', '-', '*', '/' }; public Problem(int n) {
}
public void Print()
{
Random random = new Random();
Console.WriteLine("请输入四则运算题目个数：");
n = int.Parse(Console.ReadLine());
for (int i=0; i<n; i++)
{
// char s1 = s[t];
int t = random.Next(1, 9);
//char s2 = s[t];
a = random.Next(1, 100); //生成1-100之间的随机数
b = random.Next(1, 100);
c = random.Next(1, 100);
d = random.Next(1, 100);
if (t == 1)
{
sum = a + b + c;
Console.WriteLine(a + "+" + b + "+" + c + "=" + sum);
}
else if (t == 2)
{
c = random.Next(1, a + b);
for (; a + b - c < 0;)
c = random.Next(1, a + b);
sum = a + b - c;
Console.WriteLine(a + "+" + b + "-" + c + "=" + sum);
}
else if (t == 3)
{
sum = a + b * c;
Console.WriteLine(a + "+" + b + "*" + c + "=" + sum);
}
else if (t == 4)
{
for (;b%c !=0; c = random.Next(1, b))
c = random.Next(2, b);
sum = a + b / c;
Console.WriteLine(a + "+" + b + "/" + c + "=" + sum);
}
else if (t == 5)
{
for (; b % c != 0; )
c = random.Next(2, b);
sum = a*d + b / c;
Console.WriteLine(a +"*"+d + "+" + b + "/" + c + "=" + sum);
}
else if (t == 6)
{
for (; b % c != 0;c = random.Next(1, b) )
d = random.Next(2, a);
sum = a + b / c - d;
Console.WriteLine(a + "+" + b + "/" + c + "-" + d + "=" + sum);
}
else if (t == 7)
{
for (; b % c != 0; )
c = random.Next(1, b);
sum = a + b / c*d;
Console.WriteLine(a + "+" + b + "/" + c +"*"+d+ "=" + sum);
}
else if (t == 8)
{
sum = a * b + c*d;
Console.WriteLine(a + "*" + b + "+" + c +"*"+d+ "=" + sum);
}
else if (t == 9)
{
for (; c%d != 0; )
d = random.Next(1, c);
sum = a * b + c/d;
Console.WriteLine(a + "*" + b + "+" + c +"/"+d+ "=" + sum);
}
}
}
public void Writew()
{
string fileName = @"F:\\Temp.txt";
StreamWriter sa = new StreamWriter(fileName );
sa.WriteLine();
sa.Flush();
}
}
public class Program
{
static void Main(string[] args)
{
Problem v = new Problem (1);
v.Print();
Console.Read();
}
}
}