Compilare: user.cpp: In function ‘int main()’: user.cpp:112:37: 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:113:39: 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:114:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:119:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &ax); ^ user.cpp:125:42: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d", &ri, &rj, &si, &sj); ^ user.cpp: In function ‘void lee(int, int, char, MatVal (*)[1002])’: user.cpp:61:32: warning: ‘dj2’ may be used uninitialized in this function [-Wmaybe-uninitialized] int di, dj, di1, dj1, di2, dj2; ^ user.cpp:61:27: warning: ‘di2’ may be used uninitialized in this function [-Wmaybe-uninitialized] int di, dj, di1, dj1, di2, dj2; ^ user.cpp:61:22: warning: ‘dj1’ may be used uninitialized in this function [-Wmaybe-uninitialized] int di, dj, di1, dj1, di2, dj2; ^ user.cpp:97:20: warning: ‘di’ may be used uninitialized in this function [-Wmaybe-uninitialized] i += di; ^ user.cpp:98:20: warning: ‘dj’ may be used uninitialized in this function [-Wmaybe-uninitialized] j += dj; ^ user.cpp:61:17: warning: ‘di1’ may be used uninitialized in this function [-Wmaybe-uninitialized] int di, dj, di1, dj1, di2, dj2; ^