View Compilation Error

0_0_13263910_16279.cpp: In function 'int main()':
0_0_13263910_16279.cpp:10:13: error: 'a' was not declared in this scope
   for(i=0;i<a;i++)
             ^
0_0_13263910_16279.cpp:12:13: error: 'a' was not declared in this scope
   for(i=0;i<a;i++)
             ^
0_0_13263910_16279.cpp:35:14: error: 'a' was not declared in this scope
    for(j=0;j<a;j++)
              ^