Learn exactly how to write the "if else" code. Find out the different ways of using it - you don't always need the 'else' part. Find out the short way of writing 'if-else' (less brackets to write). learn about the extremely cryptic, but extremely compact C conditional statement '?
1.if语句 if (x >1) { // 加入代码 } 说明:if与比较运算符结合使用,测试是否已达到某种条件。当x大于1,可以执行代码。圆括号中的语句为真,大括号中的语句就会执行。否则,程序将跳过这段代码。 2.if...else语句 if (x < 1) { // 执行A } else if (x >= 2) { // 执行B } else { // ...
//定义外部中断0和1的中断子程序Code(),中断触发为下跳沿触发 //当编码器码盘的OUTA脉冲信号发生下跳沿中断时, //将自动调用执行中断子程序Code()。 attachInterrupt(0, Code1, FALLING);//小车左车轮电机的编码器脉冲中断函数 attachInterrupt(1, Code2, FALLING);//小车右车轮电机的编码器脉冲中断函数 } /...
if(logic_value()!= 1) //不是1 return; } //执行1个0 if(logic_value()!= 0) //不是0 return; //执行1个1 if(logic_value()!= 1) //不是1 return; ir_code=0x00;//清零 for(i=0; i<16;i++ ) { if(logic_value() == 1) { ir_code |=(1<<i); } } } //译码函数 vo...
else { // ERROR! // 1 = initial memory load failed // 2 = DMP configuration updates failed // (if it's going to break, usually the code will be 1) Serial.print(F("DMP Initialization failed (code ")); Serial.print(devStatus); ...
void loop() { delay(100); if ( S1() ) digitalWrite(LED1, 1); else digitalWrite(LED1, 0); } Test 1 Note: true = 1; false = 0. Or should I say any value except 0 is TRUE. Note the code above. An "if" statement has the general form of: if (condition) light_led1; els...
CODE_OF_CONDUCT.md fix(spelling): Fix misspellings detected by codespell and enable it (#… Aug 28, 2024 Kconfig.projbuild fix(build): Update required components and menu Oct 22, 2024 LICENSE.md Refactor repository with pre-commit hooks (#9515) ...
else { element.innerHTML="Turn on"; xmlhttp.open("GET","?off",true); } xmlhttp.send(); } function getBrightness(){ var xmlhttp; if (window.XMLHttpRequest) {// code for IE7+, Firefox, Chrome, Opera, Safari xmlhttp=new XMLHttpRequest(); ...
void flashDashDot(const char * morseCode) { int i = 0; while(morseCode[i] != 0) { if(morseCode[i] == '.'){ dot(); } else if (morseCode[i] == '-'){ dash(); } i++; } } void dot() { digitalWrite(13, HIGH); ...
buttonHoldTime= millis();//用millis()时间函数来记时,该函数最长记录时间为9小时22分,由于本程序最多记录60分钟,所以可以使用buttonStateOld =buttonState;if(onoff==HIGH)//当进入定时设置状态时{if(j>59) { j=0; timefix=LOW; }else{ j=j+1; ...