Compilare: user.cpp: In function ‘int main()’: user.cpp:11:19: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[2000000]’ [-Wformat=] scanf("%s",&s1); ^ user.cpp:12:19: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[2000000]’ [-Wformat=] scanf("%s",&s2); ^ user.cpp:9:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("strmatch.in","r",stdin); ^ user.cpp:10:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("strmatch.out","w",stdout); ^ user.cpp:11:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",&s1); ^ user.cpp:12:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",&s2); ^