1.左下角直角三角形

Console.Write("請輸入要打印幾行：");int a = Convert.ToInt32(Console.ReadLine());for (int i = 1; i <= a; i++){for (int j = 1; j <= i; j++){Console.Write("☆");}Console.WriteLine();}

2.左上角直角三角形

Console.Write("請輸入要打印幾行：");int a = Convert.ToInt32(Console.ReadLine());for (int i = 1; i <= a; i++){for (int j = a - i; j >= 0; j--){Console.Write("☆");}Console.WriteLine();}

3.右下角直角三角形

Console.Write("請輸入要打印幾行：");int a = Convert.ToInt32(Console.ReadLine());for (int i = 0; i < a; i++){for (int j = 1; j <= a - (i + 1); j++){Console.Write(" ");}for (int k = 1; k <= i + 1; k++){Console.Write("☆");}Console.WriteLine();}

4.菱形

Console.Write("請輸入要打印幾行：");int a = Convert.ToInt32(Console.ReadLine());for (int i = 1; i <= a; i++){for (int k = 1; k <= a-i; k++){Console.Write(" ");}for (int x = 1; x <= i*2-1; x++){Console.Write("☆");}Console.WriteLine();}for (int j = 1; j < a; j++){for (int k2 = 1; k2 <= j; k2++){Console.Write(" ");}for (int x2 = 1; x2 <= (a-j)*2-1; x2++){Console.Write("★");}Console.WriteLine();}

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轉載于:https://www.cnblogs.com/franky2015/p/4631609.html

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