為什么輸出為2

#include?<stdio.h>
int?getGirth(int?a,int?b,int?c)
{
????if(?(a+b)<=c?||?(a+c)<=b?||?(b+c)<=a?)???//判斷是否為三角形
????{
????????printf("不構(gòu)成三角形\n");
????????return?0;????????????????????????????????
????}
????else
????{
??????int?cirf?=?a+b+c?;?????//計算三角形周長
?????printf("%d",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(diào)用周長函數(shù)
????return?0;
}

qq_Nowyouseeme_1

2017-10-17

源自：C語言入門 5-4

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qq_莫非回答被采納 +2 積分
2017-10-17

#include?<stdio.h>
int?getGirth(int?a,int?b,int?c)
{
????if(?(a+b)<=c?||?(a+c)<=b?||?(b+c)<=a?)???//判斷是否為三角形
????{
????????printf("不構(gòu)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(diào)用周長函數(shù)
????return?0;
}

printf("%d",cirf);需要換成return cirf;，不然輸出的時候getGirth( a,b, c)是沒有返回值的