Compilare: user.cpp: In function ‘int main()’: user.cpp:25:18: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[2000009]’ [-Wformat=] scanf("%s",&a); ^ user.cpp:26:18: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[2000009]’ [-Wformat=] scanf("%s",&b); ^ user.cpp:23:37: 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:24:39: 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:25:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",&a); ^ user.cpp:26:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",&b); ^