50 lines
2.1 KiB
C++
50 lines
2.1 KiB
C++
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// fig06_01.cpp
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// Initializing an array's elements to zeros and printing the array.
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#include <format> // C++20: This will be #include <format>
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#include <iostream>
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#include <array>
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int main() {
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std::array<int, 5> values{}; // values is an array of 5 int values
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// initialize elements of array values to 0
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for (size_t i{0}; i < values.size(); ++i) {
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values[i] = 0; // set element at location i to 0
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}
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std::cout << std::format("{:>7}{:>10}\n", "Element", "Value");
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// output each array element's value
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for (size_t i{0}; i < values.size(); ++i) {
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std::cout << std::format("{:>7}{:>10}\n", i, values[i]);
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}
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std::cout << std::format("\n{:>7}{:>10}\n", "Element", "Value");
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// access elements via the at member function
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for (size_t i{0}; i < values.size(); ++i) {
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std::cout << std::format("{:>7}{:>10}\n", i, values.at(i));
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}
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for (auto i : values){
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std::cout << std::format("{:>7}{:>8}\n", i, values.at(i));
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}
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// accessing an element outside the array's bounds with at
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values.at(10); // throws an exception
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}
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/**************************************************************************
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* (C) Copyright 1992-2022 by Deitel & Associates, Inc. and *
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* Pearson Education, Inc. All Rights Reserved. *
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* *
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* DISCLAIMER: The authors and publisher of this book have used their *
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* best efforts in preparing the book. These efforts include the *
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* development, research, and testing of the theories and programs *
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* to determine their effectiveness. The authors and publisher make *
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* no warranty of any kind, expressed or implied, with regard to these *
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* programs or to the documentation contained in these books. The authors *
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* and publisher shall not be liable in any event for incidental or *
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* consequential damages in connection with, or arising out of, the *
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* furnishing, performance, or use of these programs. *
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**************************************************************************/
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