以下两个代码段之间有什么区别? [英] What is the difference between the following two code snippets?

问题描述

int main( )
{
	long int zip; // Zip code
zip = 02137l; // Use the Zip code for Cambridge MA

std::cout << "New York's Zip code is: " << zip << '\n';
getch();
return(0);
}

&&

&&

int main( )
{
	long int zip; // Zip code
zip = 2137l; // Use the Zip code for Cambridge MA

std::cout << "New York's Zip code is: " << zip << '\n';
getch();
return(0);
}

为什么值ZIP会更改???

why the value ZIP is change ???

推荐答案

八角形.

在C ++中，从零开始的数字被当作八进制(以8为底)而不是十进制(以10为底)(除非零后面有一个"x"，在这种情况下为十六进制(以16为底)). >
[edit]忘记了)"和两个大写字母...-OriginalGriff [/edit]

Octal.

In C++ numbers beginning with zero are taken as Octal (base 8), rather than Decimal, (base 10) (unless the zero has an "x" after it, in which case it is Hex (base 16)).

[edit]Forgot a ")" and two upper case letters... - OriginalGriff[/edit]

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