Compilare: user.cpp: In function ‘int main()’: user.cpp:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:35: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:37: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:30: warning: ‘ii’ may be used uninitialized in this function user.cpp:30: warning: ‘ji’ may be used uninitialized in this function user.cpp:30: warning: ‘ifi’ may be used uninitialized in this function user.cpp:30: warning: ‘jfi’ may be used uninitialized in this function