View Compilation Error

0_0_28426484_3337.cpp: In function 'int main()':
0_0_28426484_3337.cpp:40:20: error: no match for 'operator+=' (operand types are 'std::ostream {aka std::basic_ostream<char>}' and 'int')
                cout+=a.row*b.row*b.col;
                    ^
0_0_28426484_3337.cpp:42:16: error: expected ',' or ';' before 'array'
                array.push(tmp);
                ^