Compilare: user.cpp: In function ‘int main()’: user.cpp:40:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<strlen(ch);j++) ^ user.cpp:79:9: warning: unused variable ‘imin’ [-Wunused-variable] int imin=1<<30, jmin=1<<30; ^ user.cpp:79:21: warning: unused variable ‘jmin’ [-Wunused-variable] int imin=1<<30, jmin=1<<30; ^ user.cpp:86:28: warning: ‘jj’ may be used uninitialized in this function [-Wmaybe-uninitialized] g<<minn<<' '<<ii<<' '<<jj<<' '; ^ user.cpp:86:19: warning: ‘ii’ may be used uninitialized in this function [-Wmaybe-uninitialized] g<<minn<<' '<<ii<<' '<<jj<<' '; ^