inop

iOS Multithreading implementation typesNsthreadNsoperationqueueNSObjectGCD***************1.NSThreadThreadsFirst KindNsthread *thread1=[[nsthread alloc] initwithtarget:self selector: @selector (sum) object:nil];//give the thread a name[Email protected] "thread1";Start Thread[Thread1 start];End Thread[Thread1 Cancel];The second (does not need to be manually opened ) [Nsthread detachnewthreadselector: @selector (sum) totarget:self Withobject:nil];2. two subcategories of nsoperation// one . Nsinvoc

output 1.000 2 4/+ = 1 2 + 5*1 + 4/= Question: Add spaces to the specified position in the array postexp. Program code: # Include # Include # Define Max size 1000 # Define maxop 7 Struct // set the operator priority { Char ch; // Operator Int PRI; // priority } Lpri [] = {'=', 0}, {'(', 1}, {'*', 5}, {'/', 5 }, {'+', 3}, {'-', 3}, {')', 6 }}, Rpri [] = {'=', 0}, {'(', 6}, {'*', 4}, {'/', 4 }, {'+', 2}, {'-', 2}, {')', 1 }}; Int leftpri (char OP) // evaluate the op priority of the Left Oper

IOS multithreading/GCDMultithreading-Shan Li + (SingleHandel *) Modeling Model { Static dispatch_once_t onceQueue; Dispatch_once ( onceQueue, ^ { ShareSingle = [[SingleHandel alloc] init]; }); Return shareSingle; }/* // The first thread enabling Method NSThread * thread1 = [[NSThread alloc] initWithTarget: self selector: @ selector (threadAction) object: nil]; // Name your thread Thread1.name = @ "thread1 "; // Start the thread [Thread1 start]; // Close [Thread1 cancel]; */ // Second thread enab

//Determine if CH is an operator{if(ch==' ('|| ch==' ) '|| ch==' + '|| ch=='-'|| ch==' * '|| ch=='/')return true;Else return false;}intPrecede (CharOP1,CharOP2)comparison results for//OP1 and OP2 operator Precedence{if(Leftpri (OP1) ==rightpri (OP2))return 0;Else if(Leftpri (OP1) return-1;Else return 1;}voidTransChar*Exp,CharPostexp[])//Convert an arithmetic expression exp to a suffix expression postexp{Sqstack *opstack;//define operator Stacks intI=0;//i as the subscript of Pos

>>s; the BOOLFOP =false; - intCntop =0, cnt =0; - for(inti =0; I ) - { + if(i = =0) - { + if(s[0] >='0' s[0] '9') mark[++cnt] =1; A Else if(s[0] >='a' s[0] 'Z') mark[++cnt] =0; at } - Else - { - if(S[i] = ='^'|| S[i] = ='!'|| S[i] = ='*'|| S[i] = ='.') - { -FOP =true; inOp[++cntop] =S[i]; -

Notoginsenglow[u]=min (low[u],low[v]); - } the Else if(Inst[v]) low[u]=min (low[u],dfn[v]); + } A if(dfn[u]==Low[u]) { thecnt++;intv=0; + Do{ -v=st[top--]; $belone[v]=CNT; $inst[v]=0; -} while(v!=u); - } the return; - }Wuyi voidinit () { thememset (HD,0,sizeofHD); -memset (Belone,0,sizeofbelone); Wumemset (DFN,0,sizeofDFN); -memset (Inst,0,sizeofinst); AboutDtime=0, mct=0; cnt=0; $ return; - } - intK; - intMain () { Ak=read (); + while(k--){ the

} , {' + ', 2},{'-', 2},{') ', 1}}; void Initstack (Sqstack *s); Initialize stack void Destroystack (Sqstack *s); Destroy stack bool Stackempty (Sqstack *s); Whether the stack is empty int stacklength (Sqstack *s); Returns the number of elements in the stack-the stack length bool Push (Sqstack *s,elemtype e); into the stack bool POPs (Sqstack *s,elemtype e); Out of stack bool GetTop (sqstack *s,elemtype e); Take stack top data element void Dispstack (Sqstack *s); Output stack void mu