View Compilation Error

0_0_38794279_15852.cpp: In function 'long long int jiaohuan()':
0_0_38794279_15852.cpp:17:23: error: 'a' was not declared in this scope
   17 |         long long c = a;
      |                       ^
0_0_38794279_15852.cpp:18:11: error: 'b' was not declared in this scope
   18 |         a=b;
      |           ^
0_0_38794279_15852.cpp: In function 'int main()':
0_0_38794279_15852.cpp:58:33: error: too many arguments to function 'long long int jiaohuan()'
   58 |                         jiaohuan(a,b);
      |                         ~~~~~~~~^~~~~
0_0_38794279_15852.cpp:15:11: note: declared here
   15 | long long jiaohuan()
      |           ^~~~~~~~