//图像打印
//输出一个由*组成的正方形
public static void photo() {
for (int i = 0;i < 5;i++){
for (int j = 0;j < 7;j++){
System.out.print('*');
System.out.print(" ");
}
System.out.print('\n');
}
}
//输出一个三角形
public static void photo2() {
控制行数
for (int i = 1;i <= 4;i++){
//控制每一行空格数
for (int k = 0;k <= 4 - i;k++){
System.out.print(" ");
}
//控制每一行星号
for (int j = 1;j <= 2*i - 1;j++){
System.out.print('*');
}
System.out.print("\n");
}
}