請問為什么定義不同的變量名字（x,y,z 和 a,b,c)？

剛開始定義的是 x,y,z

jackResult(int?x,?int?y,?int?z)
{
????int?sum?=?x+y+z;
????return?sum/3;
}

后面就是 a,b,c 了?

int?main()
{
????int?a?=?10;
????int?b?=?20;
????int?c?=?30;
????int?JK?=?jackResult(a,b,c);
????printf("Jack運算結果:%d",?JK);
????return?0;
}

請問為什么要定義不同名字的變量？我記得上一節的形參和實參的代碼求三角形周長定義的都是變量 a,b,c

int?getGirth(int?a,int?b,int?c)
{
????if(?(a+b)<=c?||?(a+c)<=b?||?(b+c)<=a?)
????{????????
????????printf("不構成三角形\n");????????
????????return?0;
????}
????else
????{????
????????int?cirf?=?a+b+c?;?????//計算三角形周長??????
????????return?cirf;
????}??
}

int?main()
{????/*?定義三角形三邊長?*/????
????int?a,?b,?c;????
????a?=?3;????
????b?=?4;????
????c?=?5;????
????printf("三角形的周長是：%d\n",?getGirth(a,b,c));??//調用周長函數????
????return?0;
}