Compilare: user.cpp: In function ‘int main()’: user.cpp:35:26: warning: NULL used in arithmetic [-Wpointer-arith] for(k = 0; dir[k] != NULL; ++ k) { ^ user.cpp:19:39: warning: unused variable ‘cnt’ [-Wunused-variable] int dest, d, k, n, m, i, j, x, y, cnt, liber; ^ user.cpp: In function ‘int getDir(char)’: user.cpp:14:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:17:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cobai.in", "r", stdin); ^ user.cpp:18:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cobai.out", "w", stdout); ^ user.cpp:21:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d\n", &n, &m); ^ user.cpp:23:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s", grid[i] + 1); ^ user.cpp:24:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s", dir); ^ user.cpp:56:34: warning: ‘dest’ may be used uninitialized in this function [-Wmaybe-uninitialized] printf("%.2lf", (double)dest / liber * 100); ^