View Compilation Error

0_0_4650115_5242.cpp: In function `int main()':
0_0_4650115_5242.cpp:10: error: `c' undeclared (first use this function)
0_0_4650115_5242.cpp:10: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_4650115_5242.cpp:15: error: expected `}' at end of input