如何传递参数

Question

你好，我知道代码是不完整的，但我试图找到一个三角形的区域，但我很难找到正确的功能放置和哪些返回来获得输出。我知道我会回来的公式，但我不知道我应该设置区1 =以

#include <stdio.h> 
#include <math.h> 
double calculateArea(double, double, double, double, double, double); 


int main() { 
double x1, x2, x3, y1, y2, y3, area1, premiter1; 
printf("Enter the coordinate planes"); 
scanf("%lf", &x1); 
scanf("%lf", &y1); 
scanf("%lf", &x2); 
scanf("%lf", &y2); 
scanf("%lf", &x3); 
scanf("%lf", &y3); 
area1 = 
printf("Area : %lf", area1); 
return 0; 
} 

double calculateArea() { 

return 

} 

Answer 1

没有完全理解你的问题，但似乎这是倾向于实现：

#include <stdio.h> 
#include <math.h> 
double calculateArea(double, double, double, double, double, double); 


int main() { 
double x1, x2, x3, y1, y2, y3, area1, premiter1; 
printf("Enter the coordinate planes"); 
scanf("%lf", &x1); 
scanf("%lf", &y1); 
scanf("%lf", &x2); 
scanf("%lf", &y2); 
scanf("%lf", &x3); 
scanf("%lf", &y3); 
area1 = calculateArea(x1, y1, x2, y2, x3, y3); 
printf("Area : %lf", area1); 
return 0; 
} 

double calculateArea(double x1, double y1, double x2, double y2, double x3, double y3) { 
double area; 
//your logic here. 
return area; 

} 

同样，你可以使用周边。