View Compilation Error

0_0_21803091_11017.cpp: In function 'int main()':
0_0_21803091_11017.cpp:100:25: error: 'x' was not declared in this scope
             scanf("%d",&x);
                         ^
0_0_21803091_11017.cpp:106:25: error: 'x' was not declared in this scope
             scanf("%d",&x);
                         ^