View Compilation Error

0_0_30922413_2281.cpp: In function 'int main()':
0_0_30922413_2281.cpp:10:10: error: lvalue required as left operand of assignment
    if(i%2=0)  sum1=i*i;
          ^
0_0_30922413_2281.cpp:11:10: error: lvalue required as left operand of assignment
    if(i%2=1)   sum=i*i*i;
          ^
0_0_30922413_2281.cpp:11:16: error: 'sum' was not declared in this scope
    if(i%2=1)   sum=i*i*i;
                ^