編程如何給定一個精度

Ⅰ c++中單雙精度再編程中怎樣確定簡單通俗的來。

簡單來說，單精度(single precision)浮點數精度比雙精度(double precision)浮點數范圍小，精度低，前者十進制有效數字7~8位，後者十進制有效數字14~15位。一般是指IEC-559/IEEE-754標準定義的二進制浮點數。
1L和2L錯誤，C++中有三種浮點數float、double和long double，精度（包括范圍）float<=double<=long double，具體精度由實現定義。一般實現中， float即為單精度浮點數，double即為雙精度浮點數。
單精度精度相對比較小，但相對來說比較快，只是在PC上有硬體浮點運算器實現時相差可能相對不明顯。對於性能較低（嵌入式設備）或效率要求很高的場合（例如字形渲染），應該盡可能自定義的定點數代替浮點數，即使因為復雜性等原因而不得不用浮點數，也盡可能用單精度代替雙精度（除非精度要求很高或者范圍很大float放不下）。而其它情況下（效率要求一般的數值計算），用double代替float可以少關心一些精度問題。
另外，long double是長雙精度(long double)浮點數，往往用軟體實現（CPU中的FPU可能只支持80位二進制浮點數，不能實現長雙精度浮點數的計算），可能會顯著慢於float和double運算。
注意，C++中默認不加後綴的浮點常數字面量表示是double類型，加後綴f或F是float，l是double，L是long double。
浮點數算術表達式中如果有不同精度的運算數，整數會轉換為浮點數，低精度運算數會隱式地轉換為高精度運算數。

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鍦ㄨ緭鍑烘椂
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Ⅲ 鎴戠殑AI璇曢獙綺懼害瀹氫箟

鎴戠殑AI璇曢獙綺懼害瀹氫箟

綺懼害瀹氫箟綃

Accuracy measure - 鍑嗙『搴︽祴閲

Correctness assessment - 姝ｇ『鎬ц瘎浼

Degree of exactness - 綺劇『紼嬪害

Precision vs. recall - 綺懼害涓庡彫鍥炵巼

Consistency of measurements - 嫻嬮噺鐨勪竴鑷存

Error margin - 璇宸鑼冨洿

Reliability of data - 鏁版嵁鐨勫彲闈犳

Precision in scientific research - 縐戝︾爺絀朵腑鐨勭簿紜搴

Statistical precision - 緇熻＄簿紜搴

Precision engineering - 綺懼瘑宸ョ▼

Precision medicine - 綺懼噯鍖誨

Precision manufacturing - 綺懼瘑鍒墮

Precision agriculture - 綺懼噯鍐滀笟

Precision tools - 綺懼瘑宸ュ叿

Precision cutting - 綺劇『鍒囧壊

Precision measurement instruments - 綺懼瘑嫻嬮噺浠鍣

Precision optics - 綺懼瘑鍏夊

Precision mechanics - 綺懼瘑鏈烘

Precision machining - 綺懼瘑鍔犲伐

Precision control systems - 綺懼瘑鎺у埗緋葷粺

Precision in data analysis - 鏁版嵁鍒嗘瀽涓鐨勭簿紜搴

Precision in financial forecasting - 閲戣瀺棰勬祴涓鐨勭簿紜搴

Precision in weather prediction - 澶╂皵棰勬姤涓鐨勭簿紜搴

Precision in navigation systems - 瀵艱埅緋葷粺涓鐨勭簿紜搴

Precision in GPS technology - GPS鎶鏈涓鐨勭簿紜搴

Precision in medical diagnostics - 鍖誨﹁瘖鏂涓鐨勭簿紜搴

Precision in DNA sequencing - DNA嫻嬪簭涓鐨勭簿紜搴

Precision in drug delivery - 鑽鐗╄緭閫佷腑鐨勭簿紜搴

Precision in surgical proceres - 鎵嬫湳紼嬪簭涓鐨勭簿紜搴

Precision in robotics - 鏈哄櫒浜烘妧鏈涓鐨勭簿紜搴

Precision in artificial intelligence - 浜哄伐鏅鴻兘涓鐨勭簿紜搴

Precision in computer programming - 璁＄畻鏈虹紪紼嬩腑鐨勭簿紜搴

Precision in language translation - 璇璦緲昏瘧涓鐨勭簿紜搴

Precision in image recognition - 鍥懼儚璇嗗埆涓鐨勭簿紜搴

Precision in speech synthesis - 璇闊沖悎鎴愪腑鐨勭簿紜搴

Precision in sentiment analysis - 鎯呮劅鍒嗘瀽涓鐨勭簿紜搴

Precision in recommendation systems - 鎺ㄨ崘緋葷粺涓鐨勭簿紜搴

Precision in fraud detection - 嬈鴻瘓媯嫻嬩腑鐨勭簿紜搴

Precision in customer segmentation - 瀹㈡埛緇嗗垎涓鐨勭簿紜搴

Precision in market research - 甯傚満鐮旂┒涓鐨勭簿紜搴

Precision in risk assessment - 椋庨櫓璇勪及涓鐨勭簿紜搴

Precision in decision making - 鍐崇瓥涓鐨勭簿紜搴

Precision in project management - 欏圭洰綆＄悊涓鐨勭簿紜搴

Precision in time management - 鏃墮棿綆＄悊涓鐨勭簿紜搴

Precision in communication - 娌熼氫腑鐨勭簿紜搴

Precision in problem-solving - 瑙ｅ喅闂棰樹腑鐨勭簿紜搴

Precision in interpersonal relationships - 浜洪檯鍏崇郴涓鐨勭簿紜搴

Precision in creative expression - 鍒涢犳ц〃杈句腑鐨勭簿紜搴

Precision in athletic performance - 榪愬姩琛ㄧ幇涓鐨勭簿紜搴

Precision in musical composition - 闊充箰鍒涗綔涓鐨勭簿紜搴

Precision in artistic techniques - 鑹烘湳鎶宸т腑鐨勭簿紜搴

Precision in dance movements - 鑸炶箞鍔ㄤ綔涓鐨勭簿紜搴

Precision in culinary skills - 鐑歸オ鎶宸т腑鐨勭簿紜搴

Precision in fashion design - 鏃惰呰捐′腑鐨勭簿紜搴

Precision in interior decoration - 瀹ゅ唴瑁呴グ涓鐨勭簿紜搴

Precision in architectural drawings - 寤虹瓚緇樺浘涓鐨勭簿紜搴

Precision in photography - 鎽勫獎涓鐨勭簿紜搴

Precision in painting techniques - 緇樼敾鎶宸т腑鐨勭簿紜搴

Precision in calligraphy strokes - 涔︽硶絎旂敾涓鐨勭簿紜搴

Precision in pottery shaping - 闄惰壓閫犲瀷涓鐨勭簿紜搴