📄 经典c程序100例==11--20.htm
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color=#3300cc>经典c程序100例==11--20</FONT></FONT></B></FONT></P>
<P><FONT
color=#990000>【程序11】</FONT><BR>题目：古典问题：有一对兔子，从出生后第3个月起每个月都生一对兔子，小兔子长到第三个月<BR> 后每个月又生一对兔子，假如兔子都不死，问每个月的兔子总数为多少？<BR>1.程序分析： 兔子的规律为数列1,1,2,3,5,8,13,21....<BR>2.程序源代码：<BR>main()<BR>{<BR>long
f1,f2;<BR>int
i;<BR>f1=f2=1;<BR>for(i=1;i<=20;i++)<BR> {
printf("%12ld %12ld",f1,f2);<BR> if(i%2==0)
printf("\n");/*控制输出，每行四个*/<BR> f1=f1+f2;
/*前两个月加起来赋值给第三个月*/<BR> f2=f1+f2;
/*前两个月加起来赋值给第三个月*/<BR> }<BR>}<BR>==============================================================<BR><FONT
color=#990000>【程序12】</FONT><BR>题目：判断101-200之间有多少个素数，并输出所有素数。<BR>1.程序分析：判断素数的方法：用一个数分别去除2到sqrt(这个数)，如果能被整除，<BR> 则表明此数不是素数，反之是素数。
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