View Compilation Error

0_0_29721216_25597.cpp: In function 'int main()':
0_0_29721216_25597.cpp:60:5: error: expected ';' before 'for'
     for(int i = 0; i < 2000; i += delta)
     ^
0_0_29721216_25597.cpp:60:20: error: 'i' was not declared in this scope
     for(int i = 0; i < 2000; i += delta)
                    ^