📄 c51循环语句.htm
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过循环体中没有执行的语句，跳转到下一次循环周期。语法为：</P>
<P>continue;</P>
<P>continue 同时也是一个无条件跳转语句，但功能和前面说到的 break 语句有所不一样， continue
执行后不是跳出循环，而是跳到循环的开始并执行下一次的循环。在上面的例子 中的循环体加入 if
(I==5) continue;看看什么结果？</P>
<P>return 语句</P>
<P>return 语句是返回语句，不属于循环语句，是要学习的最后一个语句所以一并写下了。
返回语句是用于结束函数的执行，返回到调用函数时的位置。语法有二种：</P>
<P>return (表达式);</P>
<P>return; 语法中因带有表达式，返回时先计算表达式，再返回表达式的值。不带表达式则返回的</P>
<P>值不确定。</P>
<P>下面是一个同样是计算 1－10 的累加，所不一样是的用了函数的方式。</P>
<P>#include <AT89X51.H></P>
<P>#include <stdio.h></P>
<P>int Count(void); //声明函数</P>
<P>void main(void)</P>
<P>{</P>
<P>unsigned int temp;</P></DIV>
<P align=left><BR style="PAGE-BREAK-BEFORE: auto"
clear=all> </P>
<DIV class=Section57>
<P>SCON = 0x50; //串行口方式 1,允许接收 TMOD =
0x20; //定时器 1 定时方式 2</P>
<P>TCON = 0x40; //设定时器 1 开始计数</P>
<P>TH1 = 0xE8; //11.0592MHz 1200 波特率
TL1 = 0xE8;</P>
<P>TI = 1;</P>
<P>TR1 = 1; //启动定时器</P>
<P>temp = Count();</P>
<P>printf ("1-10 SUM=%d\n",temp); //显示</P>
<P>while(1);</P>
<P>}</P>
<P>int Count(void)</P>
<P>{</P>
<P>unsigned int I, SUM;</P>
<P>for (I=1; I<=10; I++)</P>
<P>{</P>
<P>SUM = I + SUM; //累加</P>
<P>}</P>
<P>return (SUM);</P>
<P>}</P></DIV><BR><BR><!--推荐--></DIV></TD></TR></TBODY></TABLE></TD></TR>
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