c语言问题，求大神解答，感谢

Question

大神能把每一行的输出值都解答出来嘛，感谢感谢

Answer 1

28  // a= 4 b =10 c=a+b=4+10=14 >>a=b+c = 28

30  // a= 4 b =10 c=b=10 >>fun()  a=10 b =10 c=10 >>a=b+c = 30

34 //a=10 b =10 c =14 >> a+b+c =34

29 //a=5 b =10 c =14 >> a+b+c =29