View Compilation Error

0_0_1751804_29621.cpp: In function `int main()':
0_0_1751804_29621.cpp:14: error: `c' undeclared (first use this function)
0_0_1751804_29621.cpp:14: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_1751804_29621.cpp:35: error: `a' undeclared (first use this function)
0_0_1751804_29621.cpp:35: error: `b' undeclared (first use this function)
0_0_1751804_29621.cpp: At global scope:
0_0_1751804_29621.cpp:37: error: expected unqualified-id before "return"
0_0_1751804_29621.cpp:37: error: expected `,' or `;' before "return"
0_0_1751804_29621.cpp:38: error: expected declaration before '}' token