View Compilation Error

0_0_6462351_4703.cpp:7: error: expected `]' before ';' token
0_0_6462351_4703.cpp: In function `int main()':
0_0_6462351_4703.cpp:18: error: `c' undeclared (first use this function)
0_0_6462351_4703.cpp:18: error: (Each undeclared identifier is reported only once for each function it appears in.)