Compilare: user.cpp: In function ‘double horizontal(int, int, int, int, int, int)’: user.cpp:78:24: warning: unused variable ‘a’ [-Wunused-variable] double dist = INF, a, b, fx; ^ user.cpp:78:27: warning: unused variable ‘b’ [-Wunused-variable] double dist = INF, a, b, fx; ^ user.cpp: In function ‘double vertical(int, int, int, int, int, int)’: user.cpp:110:24: warning: unused variable ‘a’ [-Wunused-variable] double dist = INF, a, b, fy; ^ user.cpp:110:27: warning: unused variable ‘b’ [-Wunused-variable] double dist = INF, a, b, fy; ^ user.cpp: In function ‘int main()’: user.cpp:152:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("elicoptere.in", "r", stdin); ^ user.cpp:153:43: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("elicoptere.out", "w", stdout); ^ user.cpp:158:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%lf", &c, &n, &k); ^ user.cpp: In function ‘void read(int, int)’: user.cpp:31:50: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &t[ind].x[pos], &t[ind].y[pos]); ^