printf格式(％d与％u) [英] printf formatting (%d versus %u)
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问题描述
打印指针地址时%d和%u有什么区别?
What is difference between %d and %u when printing pointer addresses?
例如:
int a = 5;
// check the memory address
printf("memory address = %d\n", &a); // prints "memory address = -12"
printf("memory address = %u\n", &a); // prints "memory address = 65456"
推荐答案
您可以在此页面.
%d是有符号整数，而%u是无符号整数.指针(当被视为数字时)通常是非负的.
%d is a signed integer, while %u is an unsigned integer. Pointers (when treated as numbers) are usually non-negative.
如果您确实要显示指针，请使用%p格式说明符.
If you actually want to display a pointer, use the %p format specifier.
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