Compilare: user.cpp: In function ‘int main()’: user.cpp:81:26: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[260]’ [-Wformat=] scanf("%s\n", &s1); ^ user.cpp:82:26: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[260]’ [-Wformat=] scanf("%s\n", &s2); ^ user.cpp:71:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("logic.in", "r", stdin); ^ user.cpp:72:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("logic.out","w", stdout); ^ user.cpp:73:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n", &n); ^ user.cpp:81:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s\n", &s1); ^ user.cpp:82:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s\n", &s2); ^