Compilare: user.cpp: In function ‘int det(pct, pct, pct)’: user.cpp:19:20: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if( a.x == c.x && a.y == c.y || det > 0 || (det == 0 && ( ( ( (a.x <= b.x && b.x <= c.x) || (c.x <= b.x && b.x <= a.x) ) ^ user.cpp: In function ‘int main()’: user.cpp:28:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&n); ^ user.cpp:30:41: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&v[i].x,&v[i].y); ^ user.cpp:32:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&l); ^