C语言问题：将一字符串按ASCII大小排序main(){char a[260] ;int i,j,k;printf("please enter:");gets(a);for(i=0;a[0]!='\0'; ){for(j=0;a[j]!='\0';j++){if(a[i]>a[j]) i=j;}printf("%c",a[i]);for(k=i;a[k]!='\0';k++) a[k]=a[k+1];}getch();}为什