Compilare: user.cpp: In function ‘int main()’: user.cpp:23:23: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[10000000]’ [-Wformat=] fscanf(f, "%s", &s); ^ user.cpp:27:33: warning: NULL used in arithmetic [-Wpointer-arith] for (int i = 0; s[i] != NULL; i++) ^ user.cpp:35:28: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[10000000]’ [-Wformat=] fscanf(f, "%s", &s); ^ user.cpp:23:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%s", &s); ^ user.cpp:35:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%s", &s); ^