The following program uses an exception to end the loop. Add the necessary try-catch statements so that the program correctly reports the number of letters. #include #include #include using namespace std; int main() { cout << "Enter a sentence: "; string sentence; getline(cin, sentence); int letters{0}; ... while (sentence.at(letters)) { letters++; } cout << sentence << " contains " << letters << " letters." << endl;

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A: The Answer is in below Steps:-

Q: main.cc file

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Header files

A file with an extension that has some predefined declarations and definitions is called a header file. Every computer program imports a set of header files to perform common tasks such as getting input, displaying output, and so forth. Every language has different header files (such as C, JAVA, Python, and C++). In this article, header files are explained mainly in the context of the C/C++ language.