View Compilation Error

0_0_39765745_17007.cpp: In function 'char decodeChar(char)':
0_0_39765745_17007.cpp:11:12: error: a function-definition is not allowed here before '{' token
   11 | int main() {
      |            ^
0_0_39765745_17007.cpp:40:2: error: expected '}' at end of input
   40 | }
      |  ^
0_0_39765745_17007.cpp:5:25: note: to match this '{'
    5 | char decodeChar(char c) {
      |                         ^