经验分享：C++ error：‘syscall’ was not declared in this scope
经验分享：C++ error：‘syscall’ was not declared in this scope
【C++编译】C++ error：‘syscall’ was not declared in this scope
明明已经加了头文件#include <sys/syscall.h> #define gettid() syscall(__NR_gettid)但是依旧不能使用 syscall() 函数，检查源码后：sys/syscall.h 内部表示，他封装了![[Pasted image 20220818151746.png]]打开对应的 syscall.h 文件内部依旧没有 syscall()函....
C++ 编译错误 error: ‘cout‘ was not declared in this scope （摄氏度与华氏度的转换）
练习c++的输入输出时，编译遇到错误：【error: 'cout' was not declared in this scope error: 'cin' was not declared in this scope】原错误代码如下：#include<stdio.h> #include<iostream> int main(){ floa...
C++错误“exit was not declared in this scope”
要加入头文件#include <unistd.h>和<cstdlib> 错误解决
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