Compilare: user.cpp: In function ‘int main()’: user.cpp:21:31: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[50]’ [-Wformat=] fscanf(fin,"%s",&s); ^ user.cpp:15:10: warning: unused variable ‘ch’ [-Wunused-variable] char ch; ^ user.cpp:16:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%ld\n",&t); ^ user.cpp:21:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%s",&s); ^