蟺锛圥i锛夋槸涓€涓湪鏁板銆佺墿鐞嗐€佸伐绋嬬瓑棰嗗煙鍏锋湁閲嶈鎰忎箟鐨勫父鏁般€傚畠浠h〃鐫€鍦嗙殑鍛ㄩ暱涓庣洿寰勭殑姣斾緥锛屾槸涓€涓棤鐞嗘暟锛屽叾鍊肩害涓?.14159銆傚湪C璇█涓紝涓轰簡鏂逛究绋嬪簭鍛樺湪缂栫▼杩囩▼涓紩鐢ㄏ€锛屽紩鍏ヤ簡涓€涓悕涓衡€減i鈥濈殑瀹忓畾涔夈€傛湰鏂囧皢鍥寸粫蟺瀹忓睍寮€锛屾帰璁ㄥ叾鑳屽悗鐨勬暟瀛﹀ゥ绉樹互鍙婂湪瀹為檯缂栫▼涓殑搴旂敤銆?/p>

涓€銆佅€瀹忕殑璧锋簮涓庡畾涔?/p>

蟺瀹忚捣婧愪簬C璇█鏍囧噯搴撱€傚湪C璇█涓紝涓轰簡鏂逛究绋嬪簭鍛樺湪缂栫▼杩囩▼涓紩鐢ㄏ€锛屽皢蟺鐨勫€煎畾涔変负涓€涓畯銆傛牴鎹瓹璇█鏍囧噯锛屜€瀹忕殑瀹氫箟濡備笅锛?/p>

```c

define pi 3.14159265358979323846

```

杩欎釜瀹忓畾涔夊湪缂栬瘧杩囩▼涓紝浼氬皢绋嬪簭涓墍鏈夌殑鈥減i鈥濇浛鎹负3.14159265358979323846銆傝繖鏍凤紝绋嬪簭鍛樺湪缂栧啓绋嬪簭鏃讹紝鍙渶鍦ㄩ渶瑕佷娇鐢ㄏ€鐨勫湴鏂癸紝鐩存帴寮曠敤鈥減i鈥濆畯鍗冲彲銆?/p>

浜屻€佅€瀹忓湪鏁板棰嗗煙鐨勫簲鐢?/p>

蟺鏄竴涓棤鐞嗘暟锛屽叾鍊兼棤娉曠敤鏈夐檺鐨勫皬鏁版垨鍒嗘暟琛ㄧず銆傁€鐨勭簿纭€煎浜庢暟瀛︾爺绌跺叿鏈夐噸瑕佹剰涔夈€備互涓嬫槸涓€浜浵€鍦ㄦ暟瀛﹂鍩熺殑搴旂敤瀹炰緥锛?/p>

1. 鍦嗙殑鍛ㄩ暱涓庨潰绉绠楋細蟺鏄绠楀渾鍛ㄩ暱鍜岄潰绉殑鍏抽敭甯告暟銆備緥濡傦紝涓€涓崐寰勪负r鐨勫渾锛屽叾鍛ㄩ暱C鍜岄潰绉疉鍒嗗埆鍙互鐢ㄤ互涓嬪叕寮忚〃绀猴細

探索C语言中的π宏,从数学奥秘到编程艺术

C = 2 pi r

A = pi r r

2. 寮у害鍒朵笌瑙掑害鍒惰浆鎹細鍦ㄦ暟瀛﹀拰鐗╃悊棰嗗煙锛屽姬搴﹀埗鏄竴绉嶅父鐢ㄧ殑瑙掑害搴﹂噺鍗曚綅銆傁€鍦ㄥ姬搴﹀埗涓崰鏈夌壒娈婂湴浣嶏紝鍥犱负涓€涓畬鏁村渾鐨勫姬搴︿负2蟺銆傚洜姝わ紝鍦ㄨ繘琛岃搴﹀埗涓庡姬搴﹀埗涔嬮棿鐨勮浆鎹㈡椂锛屜€璧风潃閲嶈浣滅敤銆?/p>

涓夈€佅€瀹忓湪C璇█缂栫▼涓殑搴旂敤

鍦–璇█缂栫▼涓紝蟺瀹忚骞挎硾搴旂敤浜庡悇绫荤畻娉曞拰鏁板璁$畻銆備互涓嬫槸涓€浜浵€瀹忓湪C璇█缂栫▼涓殑搴旂敤瀹炰緥锛?/p>

1. 璁$畻鍦嗗懆鐜囷細閫氳繃杩唬绠楁硶锛屽彲浠ヨ绠楀嚭蟺鐨勮繎浼煎€笺€備互涓嬫槸涓€涓娇鐢ㄏ€瀹忚绠椣€杩戜技鍊肩殑C璇█绋嬪簭绀轰緥锛?/p>

```c

include

define pi 3.14159265358979323846

int main() {

double n = 1000000; // 杩唬娆℃暟

double term = 1.0 / n;

double sum = 0.0;

for (int i = 0; i < n; i++) {

sum += term;

term /= 2.0;

}

double pi_approx = 4.0 sum;

printf(\