Compilare: user.cpp: In function ‘int main()’: user.cpp:28:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("grozavesti.in", "r", stdin); ^ user.cpp:29:43: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("grozavesti.out", "w", stdout); ^ user.cpp:33:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:37:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &v[i][j]); ^ user.cpp:31:34: warning: ‘col’ may be used uninitialized in this function [-Wmaybe-uninitialized] int step, i, j, minval, row, col, k = 0; ^ user.cpp:31:29: warning: ‘row’ may be used uninitialized in this function [-Wmaybe-uninitialized] int step, i, j, minval, row, col, k = 0; ^