程序代码：

#include<stdio.h>
void g(char *string);
int main()
{
    char *s="a";
    int i=10;

    while(--i){
        g(s);
    }
    printf("\n");
    return 0;
}
void g(char *string)
{
    static char c=' ';
    printf("%c %s ",c,string);
    c=',';
}
            

程序代码：

#include<stdio.h>
void g(char *string);
int main()
{
    char *s="a";
    int i=10;

    while(--i){
        g(s);
    }
    printf("\n");
    return 0;
}
void g(char *string)
{
    static char c;
    c=' ';
    printf("%c %s ",c,string);
    c=',';
}

程序代码：

void g(char *string)
{
    static char c=' ';    // 这条语句只会执行一次，第二次调用这个函数的时候不会将 c 的值赋为 ' '
    printf("%c %s ",c,string);
    c=',';
}
void g(char *string)
{
    static char c;
    c=' ';    // 这条语句每次调用这个函数时都会被执行，将 c 的值赋为 ' '
    printf("%c %s ",c,string);
    c=',';
}

程序代码：

1:    #include<stdio.h>
2:    void g(char *string);
3:    int main()
4:    {
00401020   push        ebp
00401021   mov         ebp,esp
00401023   sub         esp,48h
00401026   push        ebx
00401027   push        esi
00401028   push        edi
00401029   lea         edi,[ebp-48h]
0040102C   mov         ecx,12h
00401031   mov         eax,0CCCCCCCCh
00401036   rep stos    dword ptr [edi]
5:        char *s="a";
00401038   mov         dword ptr [ebp-4],offset string "a" (00422020)
6:        int i=10;
0040103F   mov         dword ptr [ebp-8],0Ah
7:
8:        while(--i){
00401046   mov         eax,dword ptr [ebp-8]
00401049   sub         eax,1
0040104C   mov         dword ptr [ebp-8],eax
0040104F   cmp         dword ptr [ebp-8],0
00401053   je          main+43h (00401063)
9:            g(s);
00401055   mov         ecx,dword ptr [ebp-4]
00401058   push        ecx
00401059   call        @ILT+0(_g) (00401005)
0040105E   add         esp,4
10:       }
00401061   jmp         main+26h (00401046)
11:       printf("\n");
00401063   push        offset string "\n" (0042201c)
00401068   call        printf (00401100)
0040106D   add         esp,4
12:       return 0;
00401070   xor         eax,eax
13:   }
00401072   pop         edi
00401073   pop         esi
00401074   pop         ebx
00401075   add         esp,48h
00401078   cmp         ebp,esp
0040107A   call        __chkesp (00401180)
0040107F   mov         esp,ebp
00401081   pop         ebp
00401082   ret

程序代码：

1:    #include<stdio.h>
2:    void g(char *string);
3:    int main()
4:    {
00401020   push        ebp
00401021   mov         ebp,esp
00401023   sub         esp,48h
00401026   push        ebx
00401027   push        esi
00401028   push        edi
00401029   lea         edi,[ebp-48h]
0040102C   mov         ecx,12h
00401031   mov         eax,0CCCCCCCCh
00401036   rep stos    dword ptr [edi]
5:        char *s="a";
00401038   mov         dword ptr [ebp-4],offset string "a" (00422020)
6:        int i=10;
0040103F   mov         dword ptr [ebp-8],0Ah
7:
8:        while(--i){
00401046   mov         eax,dword ptr [ebp-8]
00401049   sub         eax,1
0040104C   mov         dword ptr [ebp-8],eax
0040104F   cmp         dword ptr [ebp-8],0
00401053   je          main+43h (00401063)
9:            g(s);
00401055   mov         ecx,dword ptr [ebp-4]
00401058   push        ecx
00401059   call        @ILT+0(_g) (00401005)
0040105E   add         esp,4
10:       }
00401061   jmp         main+26h (00401046)
11:       printf("\n");
00401063   push        offset string "\n" (0042201c)
00401068   call        printf (00401100)
0040106D   add         esp,4
12:       return 0;
00401070   xor         eax,eax
13:   }
00401072   pop         edi
00401073   pop         esi
00401074   pop         ebx
00401075   add         esp,48h
00401078   cmp         ebp,esp
0040107A   call        __chkesp (00401180)
0040107F   mov         esp,ebp
00401081   pop         ebp
00401082   ret