View Compilation Error

0_0_30300359_5842.cpp: In function 'int main()':
0_0_30300359_5842.cpp:41:7: error: 'c' was not declared in this scope
    if(c<0&&ss[i+1]==-80) flag=1;
       ^
0_0_30300359_5842.cpp:42:7: error: 'c' was not declared in this scope
    if(c<0&&ss[i+1]==-79) flag=0;
       ^