int main(void)
{
int a, b;
printf("請輸入一筆十進制之正整數(0~255之間):");
scanf("%d", &a);
if( a > 255 || a < 0)
{
printf("輸入範圍錯誤!!\n");
}
else
{
printf("十進制值%d轉成十六進制值為:", a);
b = a / 16;
switch(b)
{
case 10:
printf("A");
break;
case 11:
printf("B");
break;
case 12:
printf("C");
break;
case 13:
printf("D");
break;
case 14:
printf("E");
break;
case 15:
printf("F");
break;
default:
printf("%d", b);
}
b = a % 16;
switch(b)
{
case 10:
printf("A");
break;
case 11:
printf("B");
break;
case 12:
printf("C");
break;
case 13:
printf("D");
break;
case 14:
printf("E");
break;
case 15:
printf("F");
break;
default:
printf("%d", b);
}
printf("\n");
}