0_0_16457938_15370.cpp: In function 'int main()': 0_0_16457938_15370.cpp:24:15: error: 'w' was not declared in this scope while(w--) ^ 0_0_16457938_15370.cpp:31:31: error: 'sort' was not declared in this scope sort(three+1,three+1+3); ^