【判断题】Each seller of a product is willing to sell as long as the price he or she can receive is greater than the opportunity cost of producing the product.
【简答题】调试程序。请建立一个项目,把它复制到 cpp 文件中编译运行。回答以下问题。 #include using namespace std; #include int main() { int i; int a=1; for ( i = 0; i < 5; i ++ ) { a=i+1; cout << "call fun : " <