View Compilation Error

0_0_37500880_21597.cpp: In function 'int main()':
0_0_37500880_21597.cpp:7:9: error: 't' was not declared in this scope
         t = 0;
         ^
0_0_37500880_21597.cpp:8:9: error: 'b' was not declared in this scope
         b = 0;
         ^