# include <stdio.h>
void fun (char p1[],char p2[])
{
    int i,j;
    for (i=0;p1[i]!='\0';i++)
        for(j=0;p2[j]!='\0'; )
            p1[i++]=p2[j++];
    p1[i]='\0';

}




main()
{
    char s1[80],s2[40];
    //void NONO();

    printf("Enter s1 and s2:\n");
    scanf("%s%s",s1,s2);
    printf("s1=%s\n",s1);
    printf("s2=%s\n",s2);
    printf("Invoke fun(s1,s2)\n");
    fun(s1,s2);
    printf("After invoking:\n");
    printf("%s\n",s1);
//    NONO();
    return 0;

}
/*void NONO()
{
    int i;
    FILE *rf,*wf;
    char s1[80],s2[40];

    rf = fopen("in.dat","r");
    wf = fopen("out.dat","r");
    for(i=0;i<10;i++)
    {
        fscanf(rf,"%s",s1);
        fscanf(rf,"%s",s2);
        fprintf(wf,"%s\n",s1);
    }
    fclose(rf);
    fclose(wf);
}*/

运行结果
Enter s1 and s2:
a!2
b!c
s1=a!2
s2=b!c
Invoke fun(s1,s2)
After invoking:
b!c
Press any key to continue

请问我写的答案，错在哪里？因为那个是课后标准答案，不能运行。

谢谢大神，我爱你！！！！原来是少了一个分号！！！！
# include <stdio.h>
void fun (char p1[],char p2[])
{
    int i,j;
    for (i=0;p1[i]!='\0';i++);
        for(j=0;p2[j]!='\0'; )
            p1[i++]=p2[j++];
    p1[i]='\0';

}




main()
{
    char s1[80],s2[40];
    //void NONO();

    printf("Enter s1 and s2:\n");
    scanf("%s%s",s1,s2);
    printf("s1=%s\n",s1);
    printf("s2=%s\n",s2);
    printf("Invoke fun(s1,s2)\n");
    fun(s1,s2);
    printf("After invoking:\n");
    printf("%s\n",s1);
//    NONO();
    return 0;

}
/*void NONO()
{
    int i;
    FILE *rf,*wf;
    char s1[80],s2[40];

    rf = fopen("in.dat","r");
    wf = fopen("out.dat","r");
    for(i=0;i<10;i++)
    {
        fscanf(rf,"%s",s1);
        fscanf(rf,"%s",s2);
        fprintf(wf,"%s\n",s1);
    }
    fclose(rf);
    fclose(wf);
}*/