Should call fatal in scripts */ { if_state = NEUTRAL; fprintf(stderr, "syntax error: %s\n", msg); return -1; } 代码语言:javascript 代码运行次数:0 运行 AI代码解释 // execute.c - code used by small shell to execute commands #include <stdio.h> #include <stdlib.h> #include <...
测试位 if (flagset & MASK)… 置位flagset |= MASK 清除位flagset &= ~MASK code 代码语言:javascript 代码运行次数:0 运行 AI代码解释 /* showtty.c * display some current tty settings */#include<stdio.h>#include<termios.h>main(){struct termios ttyinfo;if(tcgetattr(0,&ttyinfo)==-1){perror...
cout<<"Maybeexception code:"<<endl; //提示可能出现异常的代码信息if(value2== 0) //如果除数为0则抛出异常{throw0;}else //否则直接计算相除操作{cout<<"value1/value2:"<<(value1/value2)<<endl;}}catch(inti) //捕捉参数为整型的异常{cout<<"divisoris 0!"<<endl; //异常处理代码}return0;...
static void my_exit1(void); static void my_exit2(void); int main(void) { if(atexit(my_exit2) != 0) err_sys("can't register my_exit2"); if(atexit(my_exit1) != 0) err_sys("can't register my_exit1"); printf("main is done\n"); return 0; } static void my_exit1(void...
cmd-status - Reports the status of commands including return code and duration. cmd-time - Collects the execution time of commands and exports the result to a variable that can be used elsewhere. It is similar to the built-in REPORTTIME function, but it is also slightly different. Unlike ...
The getconf(_SC_PAGE_SIZE) and sysconf(_SC_PAGE_SIZE) functions also always return 65536 (64K). mallocctl MT hot memory allocator. Not supported. There may be open source versions of other allocators, which can be used. Mallopt Provides for controls over the allocation algorithm. None; ...
); return 0; } 输出: 解释: main线程首先创建了一个子线程,线程号被指向tid,属性是默认属性,兄弟线程是func。创建线程之后用pthread_join来等待这个线程退出,最后执行End! 注意:若没有pthread_join则输出顺序是不确定的。就和例1一样。 我的例子 #include <stdio.h> #include <stdlib.h> #include <...
The thread function in the Win32 code cannot return a string value. Developers must use some other means to convey the string message back to the parent (for example, returning an index into a string array). The Win32 version of the thread function simply returns a DWORD value rather than...
Execute UNIX command and return output collapse all in page For platform-independent code, use the system command.Syntax [status,cmdout] = unix(command)Description [status,cmdout] = unix(command) calls the operating system to execute the specified command and returns the standard output of the co...
return answer; } /*设置ICMP报头*/ int pack(int pack_no) { int i,packsize; struct icmp *icmp; struct timeval *tval; icmp=(struct icmp*)sendpacket; //char sendpacket[4096]; icmp->icmp_type=ICMP_ECHO; icmp->icmp_code=0; #if 1 ...