View Compilation Error

0_0_30686280_30837.cpp: In function 'int main()':
0_0_30686280_30837.cpp:79:19: error: missing template arguments before '(' token
    x1[i] = complex(num[i], 0);
                   ^
0_0_30686280_30837.cpp:81:19: error: missing template arguments before '(' token
    x1[i] = complex(0, 0);
                   ^
0_0_30686280_30837.cpp:87:31: error: 'struct Complex' has no member named 'r'
    num[i] = (long long)(x1[i].r + 0.5);
                               ^