b & amp& amp(a+b)>c & amp& amp(b+c)>答if(a =" />
# include & ltstdio.h & gt
主()
{
雙a,b,c,m,n,l;
scanf("%lf%lf%lf ",& amp壹,& ampb & amp;c);
m = a * a
n = b * b
l = c * c
if((a+c)>b & amp& amp(a+b)>c & amp& amp(b+c)>答
if(a = = b & amp;& ampb = = c & amp& ampA==c) printf("等邊三角形");
else if((a = = b)| |(a = = c)| |(b = = c))printf("等腰三角形");
else if((m+n)= = l)| |((m+l)= = n)| |(n+l)= = m)printf("直角三角形");
Else printf("任意三角形");
}