关于最大公约数的算法
int gcd(int a,int b)
{
int t = 0;
int c = 0;
if(a==0)
return b;
if(b==0)
return a;
if(a < b)
{
t=a;
a=b;
b=t;
}
c = a % b;
while(c != 0)
{
a = b;
b = c;
c = a % b;
}
return b;
}
--------------------------------------------------
c = a % b;
while(c != 0)
{
a = b;
b = c;
c = a % b;
}
为什么这么算能得出结果?求解释