请大家帮我看看我的这道程序这里为什么会出错?要怎么改?#includevoid main(){void fun(char *s1,char *s2);char *a1,*a2;gets(a1);fun(a1,a2);printf("%s \n%s \n",a1,a2);}void fun(char *s1,char *s2){int i,j;for(i=0;*s1[i]!='\0';i++); /

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