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並前往https://www.quora.com/What-is-the-use-of-setw-in-CPP-and-what-will-it-do-in-a-cout-object

What is the use of setw() in CPP, and what will it do in a cout ...

The setw() function is used to set the field width of the output data. ... #include <iomanip> // std::setw. int main () { ... std::cout << 77 << std::endl;.

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