View Compilation Error

0_0_23260275_19076.cpp: In function 'int fun(char, char)':
0_0_23260275_19076.cpp:71:5: error: redefinition of 'int fun(char, char)'
 int fun(char a,char b)
     ^
0_0_23260275_19076.cpp:5:5: note: 'int fun(char, char)' previously defined here
 int fun(char a,char b) 
     ^
0_0_23260275_19076.cpp: In function 'int main()':
0_0_23260275_19076.cpp:84:5: error: redefinition of 'int main()'
 int main()
     ^
0_0_23260275_19076.cpp:19:5: note: 'int main()' previously defined here
 int main() 
     ^