View Compilation Error

1_867_3913_1200.cpp: In function 'bool cmp(stu, stu)':
1_867_3913_1200.cpp:13:6: error: redefinition of 'bool cmp(stu, stu)'
 bool cmp(stu a,stu b)
      ^
1_867_3913_1200.cpp:9:6: note: 'bool cmp(stu, stu)' previously defined here
 bool cmp(stu a,stu b)
      ^
1_867_3913_1200.cpp: In function 'int main()':
1_867_3913_1200.cpp:58:15: error: 'cmp1' was not declared in this scope
    sort(g,g+n,cmp1);
               ^