如何修复 C 错误 'unknown type name intptr_t'

问题：

你有类似这样的 C 代码

example.c

int v = 123;
intptr_t vptr = (intptr_t)&v;

int v = 123;
intptr_t vptr = (intptr_t)&v;

但当你尝试编译它时，你看到类似这样的错误消息

compile_error.txt

main.c: In function ‘main’:
main.c:5:1: error: unknown type name ‘intptr_t’; did you mean ‘__int128_t’?
 intptr_t vptr = (intptr_t)&v;
 ^~~~~~~~
 __int128_t
main.c:5:18: error: ‘intptr_t’ undeclared (first use in this function)
 intptr_t vptr = (intptr_t)&v;
                  ^~~~~~~~
main.c:5:18: note: each undeclared identifier is reported only once for each function it appears in

main.c: In function ‘main’:
main.c:5:1: error: unknown type name ‘intptr_t’; did you mean ‘__int128_t’?
 intptr_t vptr = (intptr_t)&v;
 ^~~~~~~~
 __int128_t
main.c:5:18: error: ‘intptr_t’ undeclared (first use in this function)
 intptr_t vptr = (intptr_t)&v;
                  ^~~~~~~~
main.c:5:18: note: each undeclared identifier is reported only once for each function it appears in

解决方案

添加

fix.c

#include <stdint.h>

#include <stdint.h>

在错误发生的源文件顶部。

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