C++ 计算三角形周长和面积代码解析及错误修正

#include<bits/stdc++.h> #include<stdio.h> using namespace std;

int main(){ double a, b, c, p, area; cin >> a >> b >> c; p = (a + b + c) / 2; area = sqrt(p*(p-a)(p-b)(p-c)); cout << 'circumference=' << a + b + c; cout << ' ' << 'area=' << fixed << setprecision(2) << area;

return 0;

}