在处理器的指令系统中，程序控制类指令的功能是（)。
- A.改变程序执行的顺序
- B.进行主存和CPU之间的数据传送
- C.进行CPU和I/O设备之间的数据传送
- D.进行算术运算和逻辑运算
正确答案及解析
正确答案
解析
程序指令包括数据处理指令（实现算数运算和逻辑运算）、数据传送指令（寄存器与主存之间的数据传送）、程序控制指令（转移指令，控制执行顺序）、输入/输出指令（各种外设的读写指令）、状态管理指令（存储保护、中断处理等功能指令）。可以顾名思义来理解，程序控制指令又称为转移指令，用来控制程序指令的执行顺序。
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