View Compilation Error

0_0_8723732_3626.cpp: In function `int main()':
0_0_8723732_3626.cpp:12: error: expected `;' before ')' token
0_0_8723732_3626.cpp:18: error: `sum' undeclared (first use this function)
0_0_8723732_3626.cpp:18: error: (Each undeclared identifier is reported only once for each function it appears in.)