<\/span><\/h2>\nLet’s take a look at a simple example to better illustrate the usage of sentinel values in C++. Consider the following code:<\/p>\n
“`cpp
\n#include <\/p>\nint main() {
\n int sum = 0;
\n int number;<\/p>\n
std::cout << \"Enter numbers to calculate their sum (enter -1 to stop):\" << std::endl;\n\n\n while (true) {
\n std::cin >> number;<\/p>\n
if (number == -1) {
\n break;
\n }<\/p>\n
sum += number;
\n }<\/p>\n
std::cout << \"The sum is: \" << sum << std::endl;\n\n\n return 0;
\n}
\n“`<\/p>\n
In this code, the sentinel value is set to -1. The program prompts the user to enter numbers continuously until they input -1. At that point, the `break` statement is executed, terminating the `while` loop and allowing the program to proceed with displaying the calculated sum.<\/p>\n