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    How to use the C language random function

     

    “#包括 #包括 使用名称空间std; #定义最大值100 int main(int argc,char*argv[]) {srand((无符号)时间(空))//srand()函数产生一个以当前时间开始的随机种子 对于(int i=0;i<10;(i++) cout<=n){ 返回随机数(m-n+1)+n; } 否则{ 返回false; } } 之所以用随机(m-n+1)是因为随机数的范围是m-n加上1.使得M也能在里面。加上N保证随机数以N为下限。 加上判断使函数更完整。另外,如果要返回一个负数随机数,也可以用随机数nm(n,0);当然,我想更一般的是用-随机(n); # 返回一个字母 函数ascii(){ var c=字符串.fromCharCode(随机(26)+65); if(随机(2)){ 返回c.toLowerCase(); } 返回c; } 返回一个不区分大小写的随机字母 如果要返回大写,把如果条件句去掉就行了。如果要返回小写,可以把条件句改为恒成立,或者去掉条件,最后一句改为: 返回c.toLowerCase();String.fromCharCode(数字)函数返回数代表数字的ASCII码码。 toLowerCase()用于将大写字母转为小写。 # 返回一个N到M之间的K个互异随机数 函数randomKdiffer(n,m,k){ arrayK=[]; var i=0; 而(i

     

     

     

     

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