View Compilation Error

0_0_20480301_10801.cpp: In function 'int fun(char, char)':
0_0_20480301_10801.cpp:37:5: error: redefinition of 'int fun(char, char)'
 int fun(char a,char b)
     ^
0_0_20480301_10801.cpp:3:6: note: 'int fun(char, char)' previously defined here
  int fun(char a,char b) 
      ^
0_0_20480301_10801.cpp: In function 'int main()':
0_0_20480301_10801.cpp:44:5: error: redefinition of 'int main()'
 int main()
     ^
0_0_20480301_10801.cpp:10:6: note: 'int main()' previously defined here
  int main() 
      ^