View Compilation Error

0_0_9029449_9896.cpp: In function `int main()':
0_0_9029449_9896.cpp:6: error: `s' undeclared (first use this function)
0_0_9029449_9896.cpp:6: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_9029449_9896.cpp:15: error: `sum1' undeclared (first use this function)