Compilare: user.cpp: In function ‘int main()’: user.cpp:24:20: warning: format ‘%u’ expects argument of type ‘unsigned int*’, but argument 3 has type ‘long unsigned int*’ [-Wformat=] fscanf(f1,"%u",&n); ^ user.cpp:26:26: warning: format ‘%u’ expects argument of type ‘unsigned int’, but argument 3 has type ‘long unsigned int’ [-Wformat=] fprintf(f2,"%u",x[1][1]); ^ user.cpp:24:21: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f1,"%u",&n); ^