Compilare: user.cpp: In function ‘void back(int)’: user.cpp:12: warning: name lookup of ‘j’ changed user.cpp:4: warning: matches this ‘j’ under ISO standard rules user.cpp:7: warning: matches this ‘j’ under old rules user.cpp: In function ‘int main()’: user.cpp:31: warning: format ‘%d’ expects type ‘int*’, but argument 3 has type ‘short unsigned int*’ user.cpp:31: warning: format ‘%d’ expects type ‘int*’, but argument 4 has type ‘short unsigned int*’ user.cpp:33: warning: format ‘%d’ expects type ‘int*’, but argument 3 has type ‘int’ user.cpp:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result