for (int y = 1; y <= 7; y++)
{
for (int x = 1; x <= y; x++)
{
Console.Write(x);
}
Console.WriteLine();//换行
}
{
for (int x = 1; x <= y; x++)
{
Console.Write(x);
}
Console.WriteLine();//换行
}
2018-11-20
double x = 13.9, y = 24.4,avg;
double sum = x + y;
avg=sum/2;
Console.WriteLine(avg);
double sum = x + y;
avg=sum/2;
Console.WriteLine(avg);
2018-11-20