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一开始用先求gcd再求lcm的方法一直WA,后来改用另外一种方法求lcm竟然过了,不明白.............
int gcd(int a,int b)
{
if(b==0)
return a;
else
gcd(b,a%b);
}
long lcm1(int a,int b) //用这个一直WA
{
if(a==b)
return a;
else
return a*b/gcd(a,b);
}
改用这个就AC了..
int lcm2(int a,int b)
{
int temp;
if(a==b)
return a;
if(a<b)
{
temp=a;
a=b;
b=temp;
}
for(int i=1;;i++)
{
int j;
j=i*a;
if(j%b==0)
return j;
}
}
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