Final answer:
To print the textbook title using constants and cout in C++, concatenate the strings with the stream insertion operator: cout << PART1 << PART2 << PART3 << endl;.
Step-by-step explanation:
The question asks for a C++ output statement using the cout stream and the provided string constants to print the title of the textbook. The appropriate C++ code using the stream insertion operator (<<) would be:
cout << PART1 << PART2 << PART3 << endl;
This line of code will result in the concatenation and output of the string constants to print out the title "Programming and Problem Solving with C++".