Compilare: user.cpp: In function ‘int main()’: user.cpp:65:12: warning: unused variable ‘l’ [-Wunused-variable] int i, l, c, dist; ^ user.cpp:65:15: warning: unused variable ‘c’ [-Wunused-variable] int i, l, c, dist; ^ user.cpp:57:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen( "poarta.in", "r", stdin ); ^ user.cpp:58:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen( "poarta.out", "w", stdout ); ^ user.cpp:62:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf( "%d%d%d", &n, &m, &k ); ^ user.cpp:63:44: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf( "%d%d%d%d", &x1, &y1, &x2, &y2 ); ^ user.cpp:69:42: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf( "%d%d", &p[i].l, &p[i].c ); ^