Question

输入三角形的三条边的边长，用c语言编写求其面积的程序

Answer 1

给你个c++的代码，c的话自己简单改一下！
#include<iostream.h>
#include<math.h>
main()
{
int
a,b,c,s;
cout<<"请输入三角形的三边长度:";
cin>>a>>b>>c;
s=(a+b+c)/2;
cout<<"the
area
is
"<<sqrt(s*(s-a)*(s-b)*(s-c))<<'\n';
}

Answer 2

给你个C++的代码，C的话自己简单改一下！
#include
#include
main()
{
int
a,b,c,s;
cout<<"请输入三角形的三边长度:";
cin>>a>>b>>c;
s=(a+b+c)/2;
cout<<"The
area
is
"<
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Answer 3

#include
#include
float
triangle(float
a,
float
b,
float
c)
{
if
(a
+
b
>
c
&&
b
+
c
>
a
&&
a
+
c
>
b)
return
1;
else
return
0;
}
void
main()
{
float
a,
b,
c,
s,
area;
printf("请输入三角形的三边:
");
scanf("%f",
&a);
scanf("%f",
&b);
scanf("%f",
&c);
if
(triangle(a,
b,
c))
{
s
=
(a
+
b
+
c)/(float)2;
area
=
(float)sqrt(s
*
(s
-
a)
*
(s
-
b)
*
(s
-
c));
printf("三角形面积为：%.2f",
area);
}
else
printf("不能构成三角形\n");
}