[英]Character Array not copying using strcpy
我正在檢查文本文件(使用HTTP請求)中的數字。 我想每次更改時都跟蹤此數字,因此我將HTTP響應收集在字符數組中,並將其與以前存儲的計數(嘗試過int,現在嘗試使用字符數組)進行比較,但它沒有似乎正在存儲結果。 lastCount
是一個全局變量,此函數用於檢查和存儲新計數:
boolean checkCount()
{
char currentLine[15];
int index=0;
if (client.connected())
{
Serial.println("Connected. Checking for availabilty of client...");
if (client.available())
{
Serial.println("Client is available! Trying to read from client...");
// read incoming bytes:
if(client.find("\r\n\r\n"))
{
char inChar;
while(inChar=client.read())
{
if(inChar==-1) break;
currentLine[index] = inChar; //read in all characters of count
currentLine[index+1] = '\0';
index++;
Serial.print("\n\nCurrent count count: ");
Serial.print(currentLine);
Serial.print("\n\n");
}
if(strcmp(currentLine,lastCount)!=0) //not equal
{
Serial.println("NOT EQUAL TO LAST COUNT");
Serial.print("last count: "); //test output
Serial.print(lastCount);
Serial.print("current count: ");
Serial.println(currentLine);
strcpy(lastCount, currentLine);//, sizeof(lastCount));
Serial.println("BLINKING LED");
blink(3);
}
else
{
Serial.println("EQUAL TO LAST COUNT");
Serial.println("NOT BLINKING.");
}
delay(5000); //delay 5 seconds (don't kill server)
return true;
}
else
{
Serial.println("newlines not found - error with request");
return false;
}
}
else
{
Serial.println("count not available");
return false;
}
}
//...
}
請參見以下代碼:
您應該將此'\\ 0'放在數組中字符串的末尾。
currentLine [index + 1] ='\\ 0'; 此行應從“ while循環”中調用。 否則,strcmp始終只能從“ currentLine”中獲得一個字符。
並且在存儲輸入時請注意字符串緩沖區的數組長度
while(inChar=client.read())
{
currentLine[index++] = inChar; //read in all characters of count
}
currentLine[index] = '\0';
if(strcmp(currentLine,lastCount)!=0) //no
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