Lcov for Linux Use

2. First install Lcov, I install the version is lcov-1.9
   

4. write a app.c file with the following code:

   #include <stdio.h>
   # Include <time.h>
   #include <stdlib.h>
   Void Main ()
   {
    int a=3;
    int b=4;
    int c=5;
   
    if (a>b&&a>c)//Determine if A is the maximum
    {
     if (b>c)
     {
      printf ("A>b>c");
    }else
     {
      printf ("a>c>b");
    
    }
    else if (b>a&&b>c)//Determine if B is the maximum
    {
      if (a>c)
     {
      printf ("b>a>c");
    }else
     {
      printf ("B>c>a");
    
    }
    else if (c>b&&c>a)//Determine if C is the maximum
    {
      if (a>b)
     {
      printf ("c>a>b");
    }else
     {
      printf ("C>b>a");
    
    }
   }
   

6. [Email protected] test]# Gcc-fprofile-arcs-ftest-coverage-o MYAPPAA app.c
   

8. [Email protected] test]#./myapp

10. [Email protected] test]# Gcov app.c
    File ' app.c '
    Lines executed:58.82% of 17
    App.c:creating ' App.c.gcov '

12. [[email protected] test]# ls
    App.c App.c.gcov app.gcda app.gcno MyApp

14. [Email protected] test]# lcov-d./-O Myapp.info-b. -C
    Capturing coverage data from./
    Found Gcov version:4.4.7
    Scanning./For. gcda files ...
    Found 1 data files in./
    Processing APP.GCDA
    Finished. Info-file Creation

16. [[email protected] test]# ls
    App.c app.gcda app.gcno MyApp myapp.info

18. [Email protected] test]# Genhtml-o Myapp_restul myapp.info
    Reading Data File Myapp.info
    Found 1 entries.
    Found common filename prefix "/opt"
    Writing. css and. png files.
    Generating output.
    Processing file zhaogh/test/app.c
    Writing Directory View page.
    Overall Coverage Rate:
    Lines ...: 58.8% (ten of lines)
    Functions.: 100.0% (1 of 1 function)
    Branches ...: 33.3% (6 of branches)

20. SZ Myapp_restul

22. Then open index to see the coverage of code execution

24. 650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M02/6F/25/wKioL1WTTwmQpUaZAARDsYBm_gM973.jpg "title=" Lcov.png "alt=" Wkiol1wttwmqpuazaardsybm_gm973.jpg "/>
    

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Lcov for Linux Use