Compilare: user.cpp: In function ‘int main()’: user.cpp:19:25: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[256]’ [-Wformat=] fscanf(f,"%s",&a); ^ user.cpp:13:15: warning: variable ‘w’ set but not used [-Wunused-but-set-variable] int i,j,q,w,e,r,aux; ^ user.cpp:16:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&n); ^ user.cpp:19:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%s",&a); ^