[問題] 沒有宣告？
#include <stdio.h>
#include <math.h>
typedef struct{
float x;
float y;
} point;
float distance(pointP1, pointP2)
{
return sqrt((P1.x-P2.x)*(P1.x-P2.x)+(P1.y-P2.y)*(P1.y-P2.y));
}
float triangleArea(pointP1, pointP2, pointP3);
{
float s, a, b, c;
a = distance(P2, P3);
b = distance(P1, P3);
c = distance(P2, P1);
s = (a+b+c)/2;
return sqrt(s*(s-a)*(s-b)*(s-c));
}
編譯器下去跑是說
7 C:\Users\user\Desktop\新文件1.cpp `pointP1' was not declared in this scope
不知道他說的沒有宣告是什麼意思？
有高手可以幫我解答嗎，謝謝！ ^^
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