我正在开发一款带有 Blue Bamboo 打印机的打印机应用程序。我想通过它打印一个图像，但我无法将其转换为无符号字符数组，因为它们在示例代码中提供。我怎样才能做到这一点？这是他们提供的示例代码。
unsigned char buffer3[796]={
0x55 , 0x66 , 0x77 , 0x88 , 0x44 , 0x1B , 0x58 , 0x31 ,
0x19, 0x20,
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};