Arduino字符串转换为字符数组

• ：11927 2014-03-27

1. void setup()
2. {
3. Serial.begin(9600);
4. }
7. void loop()
8. {
9. unsigned long along = 1234213;
10. String str1 = String(along);
11. str1 += 'mimi';
12. char cArr[str1.length() + 1];
13. char cArr2[str1.length() + 3];
14. str1.toCharArray(cArr,str1.length() + 1);
15. str1.toCharArray(cArr2,str1.length() + 3);
16. Serial.println(str1);
17. Serial.println(cArr);
18. Serial.println(cArr2);
19. Serial.println(sizeof(str1));
20. Serial.println(sizeof(cArr));
21. Serial.println(sizeof(cArr2));
22. Serial.println(strlen(cArr));
23. Serial.println(strlen(cArr2));
24. if(cArr[str1.length()] == '\0')
25. {
26. Serial.println('cArr1: has ending mark. ');
27. }
28. if(cArr2[str1.length()] == '\0')
29. {
30. Serial.println('cArr2: has ending mark. ');
31. }
32. while(1);
33. }

一般用于将数值转为字符串或字符数组保存起来或传给lcd.

.toCharArray(字符数组buf, 字符数组长度);