1. Consider the following C++ code:#include int main(){double x = 15.3;double y;y = std::pow(x 2);…}This example accesses the function pow of the header file cmath.2. Consider the following C++ code:#include …int main(){using namespace std;…}…In this example the function main can refer to the global identifiers of the header file iostream without using the prefix std:: before the identifier name. The using statement appears inside the function main. Therefore other functions (if any) should use the prefix std:: before the name of the global identifier of the header file iostream unless the function has a similar using statement.
