Compilare: user.cpp: In function ‘int main()’: user.cpp:69:39: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[110]’ [-Wformat=] scanf("%s%s%d%c",&s1,&s2,&t,&enter); ^ user.cpp:69:39: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[110]’ [-Wformat=] user.cpp:73:22: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[110]’ [-Wformat=] scanf("%s",&s); ^ user.cpp:65:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bifo.in","r",stdin); ^ user.cpp:66:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bifo.out","w",stdout); ^ user.cpp:69:40: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s%s%d%c",&s1,&s2,&t,&enter); ^ user.cpp:73:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",&s); ^