Compilare: user.cpp: In function ‘void lee(int, int, int (*)[1005][4])’: user.cpp:39:15: warning: unused variable ‘currentL’ [-Wunused-variable] int i,j,k,currentL,currentC,currentDirection,currentCost; ^ user.cpp:39:24: warning: unused variable ‘currentC’ [-Wunused-variable] int i,j,k,currentL,currentC,currentDirection,currentCost; ^ user.cpp:39:33: warning: unused variable ‘currentDirection’ [-Wunused-variable] int i,j,k,currentL,currentC,currentDirection,currentCost; ^ user.cpp:39:50: warning: unused variable ‘currentCost’ [-Wunused-variable] int i,j,k,currentL,currentC,currentDirection,currentCost; ^ user.cpp: In function ‘int main()’: user.cpp:63:35: 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:64:37: 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:66:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:73:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&a[i][j]); ^ user.cpp:76:38: 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); ^