[考題] 計算機概論 程式輸出問題

考慮以下 C 程式 int fun (int *x) { *x += 4; return 4 * (*x) –2; } void main() { int x = 20, y = 30, w,z; w = fun(&x) + (x/2); z = fun(&y) + (y/2); printf(“%d,%d”, w,z); } 程式執行後,w, z 的值為何? a.48與151 b.106與151 c.104與133 d.48與133 答案為b 想請問各位高手他是怎麼運算的啊？ --
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推 godpam:w=4*24-2+24/2=106 07/16 16:22

→ godpam:z=4*34-2+34/2=151 07/16 16:22

→ fatty3321:這題出題老師其實還蠻溫柔的XD如果是我一定把a或c挑一個 07/16 16:24

→ fatty3321:改106XD 07/16 16:25

推 j16598231:x=20，呼叫後x變24。w=94+24/2 07/16 16:26

→ Kingofjungle:不懂原理的話GOOGLE CALL BY VALUE，CALL BY ADRESS 07/16 16:32