Compilare: user.cpp: In function ‘int main()’: user.cpp:85:53: warning: operation on ‘j’ may be undefined [-Wsequence-point] *i=*--(j=i)+*----(j=i); ^ user.cpp:89:53: warning: operation on ‘j’ may be undefined [-Wsequence-point] *i=*----(j=i)-*--(j=i); ^ user.cpp:93:53: warning: operation on ‘j’ may be undefined [-Wsequence-point] *i=*--(j=i)**----(j=i); ^ user.cpp:97:55: warning: operation on ‘j’ may be undefined [-Wsequence-point] *i=*----(j=i)/(*--(j=i)); ^ user.cpp:23:42: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%c",&ch); ^ user.cpp:31:67: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%c",&ch); ^