1 #include <stdio.h>
 2 int fibonacci(int n);
 3
 4 int main ()
 5 {
 6    int fib;
 7    int n;
 8
 9    for (n = 0; n <= 10; n++) {
10       fib = fibonacci(n);
11       printf("fibonnaci(%d) = %d\n", n, fib);
12    }
13
14    return 0;
15 }
16
17 int fibonacci(int n)
18 {
19    int fib;
20    if (n <= 0) {
21       fib = 0;
22    }
23    else if (n == 1) {
24       fib = 1;
25    }
26    else {
27       fib = fibonacci(n -1) + fibonacci(n - 2);
28    }
29
30    return fib;
31 }

gcc fib.o -o fib --coverage //我用的这个
gcc fib.o -o fib -lgcov
gcc fib.o -o fib -fprofile-arcs

  1         -:    0:Source:fib.c2         -:    0:Graph:fib.gcno3         -:    0:Data:fib.gcda4         -:    0:Runs:15         -:    0:Programs:16         -:    1:#include <stdio.h>7         -:    2:8         -:    3:int fibonacci(int n);9         -:    4:10         1:    5:int main ()11         -:    6:{12         -:    7:   int fib;13         -:    8:   int n;14         -:    9:15        12:   10:   for (n = 0; n <= 10; n++) {16        11:   11:      fib = fibonacci(n);17        11:   12:      printf("fibonnaci(%d) = %d\n", n, fib);18         -:   13:   }19         -:   14:20         1:   15:   return 0;21         -:   16:}22         -:   17:23       453:   18:int fibonacci(int n)24         -:   19:{25         -:   20:   int fib;26       453:   21:   if (n <= 0) {27        89:   22:      fib = 0;28         -:   23:   }29       364:   24:   else if (n == 1) {30       143:   25:      fib = 1;31         -:   26:   }32         -:   27:   else {33       221:   28:      fib = fibonacci(n -1) + fibonacci(n - 2);34         -:   29:   }35         -:   30:36       453:   31:   return fib;37         -:   32:}

[mobdev@ip-*** gtest]$lcov -c -o fib.info -d .
Capturing coverage data from .
Found gcov version: 4.8.3
Scanning . for .gcda files ...
Found 1 data files in .
Processing fib.gcda
Finished .info-file creation  //表示成功

[mobdev@ip-*** gtest]$genhtml fib.info -o fib_result
Reading data file fib.info
Found 1 entries.
Found common filename prefix "***cppTest"
Writing .css and .png files.
Generating output.
Processing file gtest/fib.c
Writing directory view page.
Overall coverage rate:lines......: 100.0% (12 of 12 lines)  //代码逻辑行覆盖率functions..: 100.0% (2 of 2 functions)//代码方法覆盖率

tar cvf fib_result.tar.gz fib_result/
sz  fib_result.tar.gz   //下载windows路径
在windows路径下，解压tar.gz文件，进入路径,在浏览器打开index.html如下图 

[user@ip-******* gtest]$gcov -v
gcov (GCC) 4.8.3 20140911 (Red Hat 4.8.3-9)
Copyright (C) 2013 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.[user@ip-******* gtest]$lcov -v
lcov: LCOV version 1.9

http://www.linuxidc.com/Linux/2011-05/36537.htm