Eroare de compilare: user.cpp: In function ‘void solve(int, int, int, int)’: user.cpp:12:5: error: ‘c2’ was not declared in this scope c2 = cos(angle) * dist; ^ user.cpp:13:5: error: ‘d1’ was not declared in this scope d1 = abs(x - (1 - y * b) / a); ^ user.cpp:8:33: warning: unused variable ‘c2d1’ [-Wunused-variable] double oposite = 0,angle,c1,c2d1,d2,minim; ^ user.cpp: In function ‘void read()’: user.cpp:22:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&t); ^ user.cpp:25:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d",&a,&b,&x,&y); ^ user.cpp: In function ‘int main()’: user.cpp:30:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("distanta.in","r",stdin); ^ user.cpp:31:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("distanta.out","w",stdout); ^