Compilare: user.cpp: In function ‘int main()’: user.cpp:11:24: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[2000002]’ [-Wformat=] scanf("%s %s",&a,&b); ^ user.cpp:11:24: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[2000002]’ [-Wformat=] user.cpp:20:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<poz.size();++i)printf("%d ",poz[i]); ^ 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:11:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s %s",&a,&b); ^