View Compilation Error

0_0_38581745_4370.cpp:39:1: error: stray '`' in program
 ```bash
 ^
0_0_38581745_4370.cpp:39:2: error: stray '`' in program
 ```bash
  ^
0_0_38581745_4370.cpp:39:3: error: stray '`' in program
 ```bash
   ^
0_0_38581745_4370.cpp:39:4: error: 'bash' does not name a type
 ```bash
    ^~~~
0_0_38581745_4370.cpp:58:5: error: redefinition of 'int main()'
 int main()
     ^~~~
0_0_38581745_4370.cpp:2:5: note: 'int main()' previously defined here
 int main()
     ^~~~
0_0_38581745_4370.cpp: In function 'int main()':
0_0_38581745_4370.cpp:71:5: error: 'erfen' was not declared in this scope
   y=erfen(a,n,x);
     ^~~~~