CS计算机代考程序代写 #include

#include
#include
using namespace std;

int main() {
string str1 = “Hello”;
string str2 = “World”;
string str3;
int len;

// copy str1 into str3
str3 = str1;
cout << "str3 : " << str3 << endl; // concatenates str1 and str2 str3 = str1 + str2; cout << "str1 + str2 : " << str3 << endl; // total length of str3 after concatenation len = str3.size(); cout << "str3.size() : " << len << endl; // compare two strings cout << "str1 is lexically " << (str1.compare(str2)) << " away from str2" << endl; return 0; }