Compilare: user.cpp: In function ‘int main()’: user.cpp:16:23: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[260]’ [-Wformat=] scanf("%s",&st); ^ user.cpp:10:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("matrice3.in", "r", stdin); ^ user.cpp:11:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("matrice3.out", "w", stdout); ^ user.cpp:12:36: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%hi %hi%hi", &n, &m,&t); ^ user.cpp:16:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",&st); ^ user.cpp:43:50: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%hi %hi %hi %hi", &x, &y, &a, &b); ^