Compilare: user.cpp: In function ‘int main()’: user.cpp:20:44: warning: variable ‘val’ set but not used [-Wunused-but-set-variable] int n, m, i, j, iI, jI, iO, jO, nr, k, val = 0; ^ user.cpp:22:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("barbar.in","r",stdin); ^ user.cpp:23:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("barbar.out","w",stdout); ^ user.cpp:24:28: 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:25:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%c", &ch); ^ user.cpp:51:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%c", &ch); ^ user.cpp:53:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%c", &ch); ^ user.cpp:104:21: warning: ‘jO’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(i == iO && j == jO){ ^ user.cpp:104:10: warning: ‘iO’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(i == iO && j == jO){ ^ user.cpp:80:18: warning: ‘jI’ may be used uninitialized in this function [-Wmaybe-uninitialized] d[iI][jI] = 0; ^ user.cpp:80:18: warning: ‘iI’ may be used uninitialized in this function [-Wmaybe-uninitialized]