Compilare: user.cpp: In function ‘int main()’: user.cpp:16: warning: format ‘%d’ expects type ‘int*’, but argument 3 has type ‘int’ user.cpp:70: warning: too many arguments for format user.cpp:11: warning: unused variable ‘a’ user.cpp:11: warning: unused variable ‘b’ user.cpp:11: warning: unused variable ‘j’ user.cpp:13: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:16: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:19: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:18: warning: ‘n’ may be used uninitialized in this function