Compilare: user.cpp: In function ‘int main()’: user.cpp:27:21: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[505]’ [-Wformat=] fscanf(f,"%s",&a); ^ user.cpp:27:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%s",&a); ^