Compilare: user.cpp: In function ‘int main()’: user.cpp:34:15: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[100]’ [-Wformat=] scanf("%s",&s1); ^ user.cpp:36:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<strlen(s1);i++) ^ user.cpp:40:15: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[100]’ [-Wformat=] scanf("%s",&s1); ^ user.cpp:42:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<strlen(s1);i++) ^ user.cpp:32:29: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("tort.in","r",stdin); ^ user.cpp:33:31: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("tort.out","w",stdout); ^ user.cpp:34:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",&s1); ^ user.cpp:40:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",&s1); ^