Compilare: user.cpp: In function ‘void show()’: user.cpp:22:42: warning: format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘long long int’ [-Wformat=] fprintf(fout,"%d",a[0][j]); ^ user.cpp: In function ‘int main()’: user.cpp:144:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%ld",&n); ^