View Compilation Error

0_0_35605130_30086.cpp: In function 'int main()':
0_0_35605130_30086.cpp:16:22: error: expected ';' before '==' token
             for(int i==0;i<a.length();i++)
                      ^
0_0_35605130_30086.cpp:16:22: error: expected primary-expression before '==' token
0_0_35605130_30086.cpp:16:38: error: expected ')' before ';' token
             for(int i==0;i<a.length();i++)
                                      ^
0_0_35605130_30086.cpp:16:39: error: 'i' was not declared in this scope
             for(int i==0;i<a.length();i++)
                                       ^