View Compilation Error

0_0_28849806_5501.cpp: In function 'int main()':
0_0_28849806_5501.cpp:8:14: error: 'paixu' was not declared in this scope
     paixu(a,n);
              ^
0_0_28849806_5501.cpp:9:15: error: 'shuchu' was not declared in this scope
     shuchu(a,n);
               ^