Compilare: user.cpp: In function ‘void back(int)’: user.cpp:59: warning: comparison between signed and unsigned integer expressions user.cpp:66: warning: comparison between signed and unsigned integer expressions user.cpp:58: warning: unused variable ‘j’ user.cpp: In function ‘int main()’: user.cpp:79: warning: format ‘%d’ expects type ‘int*’, but argument 3 has type ‘long unsigned int*’ user.cpp:80: warning: format ‘%d’ expects type ‘int*’, but argument 3 has type ‘long unsigned int*’ user.cpp:85: warning: format ‘%d’ expects type ‘int*’, but argument 3 has type ‘long unsigned int*’ user.cpp:87: warning: format ‘%d’ expects type ‘int*’, but argument 3 has type ‘long unsigned int*’ user.cpp:90: warning: format ‘%d’ expects type ‘int*’, but argument 3 has type ‘long unsigned int*’ user.cpp:95: warning: format ‘%d’ expects type ‘int*’, but argument 3 has type ‘long unsigned int*’ user.cpp:79: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:80: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:85: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:87: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:90: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:95: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result