#include <iostream.h>
#include <iomanip.h>
#include <math.h>float area(float a, float b, float c); //函数声明void main()
{
float a,b,c;
cout <<"please input 3 sides of one triangle:\n";
cin >>a >>b >>c; //输入时以空格作为数据间隔 float result = area(a,b,c); //函数调用 cout <<setiosflags(ios::fixed) <<setprecision(2)
<<"a=" <<setw(7) <<a
<<",b=" <<setw(7) <<b
<<",c=" <<setw(7) <<c <<endl;
cout <<"area of triangle is " <<setw(10)
<<setprecision(5) <<result <<endl;
}float area(float a, float b, float c) //函数定义
{
float s=(a+b+c)/2;
return sqrt(s*(s-a)*(s-b)*(s-c));
}a,b,c的输入值分别是6,6,8,运行结果
#include <iomanip.h>
#include <math.h>float area(float a, float b, float c); //函数声明void main()
{
float a,b,c;
cout <<"please input 3 sides of one triangle:\n";
cin >>a >>b >>c; //输入时以空格作为数据间隔 float result = area(a,b,c); //函数调用 cout <<setiosflags(ios::fixed) <<setprecision(2)
<<"a=" <<setw(7) <<a
<<",b=" <<setw(7) <<b
<<",c=" <<setw(7) <<c <<endl;
cout <<"area of triangle is " <<setw(10)
<<setprecision(5) <<result <<endl;
}float area(float a, float b, float c) //函数定义
{
float s=(a+b+c)/2;
return sqrt(s*(s-a)*(s-b)*(s-c));
}a,b,c的输入值分别是6,6,8,运行结果
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