Compilare: user.cpp: In function ‘int main()’: user.cpp:45:36: warning: format ‘%d’ expects argument of type ‘int*’, but argument 2 has type ‘bool*’ [-Wformat=] scanf("%d", &grid[i][j]); ^ user.cpp:40:9: warning: unused variable ‘sol’ [-Wunused-variable] int sol, i, j, val, l2, c2, xNew, yNew, delNew, k, x, y, del, dir, chMin, cnt, *pos; ^ user.cpp:40:79: warning: unused variable ‘cnt’ [-Wunused-variable] int sol, i, j, val, l2, c2, xNew, yNew, delNew, k, x, y, del, dir, chMin, cnt, *pos; ^ user.cpp:38:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("robot2.in" ,"r", stdin); ^ user.cpp:39:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("robot2.out", "w", stdout); ^ user.cpp:42:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:45:37: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &grid[i][j]); ^ user.cpp:46:42: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d", &l1, &c1, &l2, &c2); ^