Compilare: user.cpp: In function ‘int main()’: user.cpp:25:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(strlen(cuv)+kc+ok<=y) ^ user.cpp:42:19: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null] p[strlen(p)-1]=NULL; ^ user.cpp:72:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(strlen(cuv)+kc+ok<=y) ^ user.cpp:37:9: warning: unused variable ‘kon’ [-Wunused-variable] int kon=1,lkon,nrs,i,j; ^ user.cpp:90:18: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null] p[strlen(p)-1]=NULL; ^ user.cpp:85:6: warning: unused variable ‘kon’ [-Wunused-variable] int kon=1,lkon,nrs,i,j; ^ user.cpp:65:5: warning: ‘lu’ may be used uninitialized in this function [-Wmaybe-uninitialized] for(i=0; i<lu; i++) ^