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循ç°çè¤é度ã¯Thomas J. McCabeæ°ã«ãã£ã¦1976å¹´ã«èæ¡ãããææ¨ã§ãã
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10ä»¥ä¸ | é常ã«è¯ãæ§é | 25% |
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Software Architecture Metrics
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This metric is well researched, and we know that error rates increase quickly for all values above 24. I recommend a threshold of 15, to stay on the safe side.
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ãã®ææ¨ã¯ããç 究ããã¦ããã24ãè¶ ãããã¹ã¦ã®å¤ã«å¯¾ãã¦ã¨ã©ã¼çãæ¥éã«å¢å ãããã¨ãããã£ã¦ãã¾ããå®å ¨ã確ä¿ããããã«ãç§ã¯15ã®é¾å¤ãæ¨å¥¨ãã¾ãã
Software Architecture Metrics: Case Studies to Improve the Quality of Your Architecture
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In general, the industry thresholds for CC suggest that a value under 10 is acceptable, barring other considerations such as complex domains. We consider that threshold very high and would prefer code to fall under five, indicating cohesive, well-factored code.Â
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ã½ã¼ã¹ã³ã¼ãã®ä½æã¯ChatGPTã«ãé¡ããã¦ãã¾ãããCheckStyleã§ã確èªãã¦ãã¾ãã
循ç°çè¤é度ã5ã®ã³ã¼ã
public class CyclomaticComplexityExample5 {
  public static void exampleMethod(int a, int b, int c, int d) {
    if (a > b) {
      // ãã¹1
      System.out.println("a is greater than b");
    } else {
      // ãã¹2
      System.out.println("b is greater than or equal to a");
    }
    for (int i = 0; i < c; i++) {
      // ãã¹3
      System.out.println("i: " + i);
    }
    if (c > 10) {
      // ãã¹4
      System.out.println("c is greater than 10");
    }
    if (d % 2 == 0) {
      // ãã¹5
      System.out.println("d is even");
    }
  }
}
循ç°çè¤é度ã10ã®ã³ã¼ã
public class CyclomaticComplexityExample10 {
  public static void exampleMethod(int a, int b, int c, int d, int e) {
    if (a > 0) { // 1
      System.out.println("a is positive");
    }
    if (b > 0) { // 2
      System.out.println("b is positive");
    }
    if (c > 0) { // 3
      System.out.println("c is positive");
    }
    if (d > 0) { // 4
      System.out.println("d is positive");
    }
    if (a < 0) { // 5
      System.out.println("a is negative");
    }
    if (b < 0) { // 6
      System.out.println("b is negative");
    }
    if (c < 0) { // 7
      System.out.println("c is negative");
    }
    if (d < 0) { // 8
      System.out.println("d is negative");
    }
    if (e != 0) { // 9
      System.out.println("e is non-zero");
    }
    // ããã©ã«ããã¹ï¼10ï¼
    System.out.println("Check complete");
  }
}
循ç°çè¤é度ã15ã®ã³ã¼ã
public class CyclomaticComplexityExample15 {
  public static void exampleMethod(int a, int b, int c, int d, int e) {
    if (a > 0) { // 1
      System.out.println("a is positive");
    }
    if (b > 0) { // 2
      System.out.println("b is positive");
    }
    if (c > 0) { // 3
      System.out.println("c is positive");
    }
    if (d > 0) { // 4
      System.out.println("d is positive");
    }
    if (e > 0) { // 5
      System.out.println("e is positive");
    }
    if (a < 0) { // 6
      System.out.println("a is negative");
    }
    if (b < 0) { // 7
      System.out.println("b is negative");
    }
    if (c < 0) { // 8
      System.out.println("c is negative");
    }
    if (d < 0) { // 9
      System.out.println("d is negative");
    }
    if (e < 0) { // 10
      System.out.println("e is negative");
    }
    if (a == 0) { // 11
      System.out.println("a is zero");
    }
    if (b == 0) { // 12
      System.out.println("b is zero");
    }
    if (c == 0) { // 13
      System.out.println("c is zero");
    }
    if (d == 0) { // 14
      System.out.println("d is zero");
    }
    // ããã©ã«ããã¹ï¼15ï¼
    System.out.println("Evaluation complete");
  }
}
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