View Compilation Error

0_0_6712343_1931.cpp: In function `int main()':
0_0_6712343_1931.cpp:142: error: `res1' undeclared (first use this function)
0_0_6712343_1931.cpp:142: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_6712343_1931.cpp:152: error: `res2' undeclared (first use this function)