Compilare: main.cpp: In function 'int main()': main.cpp:10:16: warning: format '%s' expects argument of type 'char*', but argument 2 has type 'char (*)[2000001]' [-Wformat=] scanf("%s", &a); ^ main.cpp:11:16: warning: format '%s' expects argument of type 'char*', but argument 2 has type 'char (*)[2000001]' [-Wformat=] scanf("%s", &b); ^ main.cpp:14:6: warning: unused variable 'y' [-Wunused-variable] int y=strlen(b); ^ main.cpp:6:36: 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); ^ main.cpp:7:38: 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); ^ main.cpp:10:17: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%s", &a); ^ main.cpp:11:17: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%s", &b); ^