c语言中%f与%lf有什么区别?
最简单的区别:%f
一般对应单精度类型
float
%lf
一般对应双精度类型
double。
绛旓細鍦╟璇█涓璮鍜宭f鐨勫叏绉版槸%lf 涓%f锛屽畠浠殑鍖哄埆濡備笅锛1銆佹墍鑳借〃绀烘暟鐨勮寖鍥翠笉鍚銆傚崟绮惧害娴偣鐨勮〃绀鸿寖鍥达細-3.40E+38 ~ +3.40E+38锛屽弻绮惧害娴偣鐨勮〃绀鸿寖鍥达細-1.79E+308 ~ +1.79E+308 2銆鏈夋晥鏁板瓧浣嶆暟涓嶅悓銆傚崟绮惧害娴偣鏁版湁鏁堟暟瀛椾繚璇6浣嶏紝閮ㄥ垎7浣嶏紝鍙岀簿搴︽诞鐐规暟鏈夋晥鏁板瓧淇濊瘉15浣嶏紝閮ㄥ垎16浣嶃
绛旓細涓昏鏈変竴涓嬪洓鐐瑰尯鍒細1銆佷唬琛ㄧ殑鏁版嵁绫诲瀷涓嶅悓 f浠ｈ〃鍗曠簿搴︽诞鐐瑰瀷鏁版嵁锛坒loat锛夛紝%lf浠ｈ〃鍙岀簿搴︽诞鐐瑰瀷鏁版嵁锛坉ouble锛銆2銆鏈夋晥鏁板瓧浣嶆暟涓嶅悓 鍗曠簿搴︽诞鐐规暟鏈夋晥鏁板瓧淇濊瘉6浣嶏紝閮ㄥ垎7浣嶏紝鍙岀簿搴︽诞鐐规暟鏈夋晥鏁板瓧淇濊瘉15浣嶏紝閮ㄥ垎16浣嶃3銆鎵鑳借〃绀烘暟鐨勮寖鍥翠笉鍚 鍗曠簿搴︽诞鐐圭殑琛ㄧず鑼冨洿锛-3.40E+38 ~ +3.40E...
绛旓細涓昏鏈変竴涓嬪洓鐐瑰尯鍒細1銆佷唬琛ㄧ殑鏁版嵁绫诲瀷涓嶅悓 f浠ｈ〃鍗曠簿搴︽诞鐐瑰瀷鏁版嵁锛坒loat锛夛紝%lf浠ｈ〃鍙岀簿搴︽诞鐐瑰瀷鏁版嵁锛坉ouble锛銆2銆鏈夋晥鏁板瓧浣嶆暟涓嶅悓 鍗曠簿搴︽诞鐐规暟鏈夋晥鏁板瓧淇濊瘉6浣嶏紝閮ㄥ垎7浣嶏紝鍙岀簿搴︽诞鐐规暟鏈夋晥鏁板瓧淇濊瘉15浣嶏紝閮ㄥ垎16浣嶃3銆鎵鑳借〃绀烘暟鐨勮寖鍥翠笉鍚 鍗曠簿搴︽诞鐐圭殑琛ㄧず鑼冨洿锛-3.40E+38 ~ +3.40E...
绛旓細1銆%f 鏄緭鍑 float 鍨嬪彉閲忥紱%f 鏄緭鍑 double 鍨嬪彉閲忥紱%Lf 鏄緭鍑 long double 鍨嬪彉閲銆2銆佸湪C璇█涓紝瀵逛簬鏁板肩被鍨嬪彧鏈夐氳繃printf绫诲嚱鏁拌緭鍑鸿繖涓绉嶆柟寮忥紝姣斿printf, sprintf, fprintf绛夈傝繖绫诲嚱鏁拌緭鍑烘椂瑕佹眰鏈夋牸寮忕鍙凤紝鍏朵腑long double鐨勬牸寮忕鍙蜂负%Lf銆備互涓嬫槸涓涓畝鍗曠殑鍙傝冧唬鐮侊紝杈撳嚭鍒版爣鍑嗚緭鍑...
绛旓細f 鏄緭鍑 double 鍨嬪彉閲忥紱鍖哄垎锛%f 鏄緭鍑 float 鍨嬪彉閲忥紱%Lf 鏄緭鍑 long double 鍨嬪彉閲銆傚熀鏈暟鎹被鍨 void锛氬０鏄庡嚱鏁版棤杩斿洖鍊兼垨鏃犲弬鏁帮紝澹版槑鏃犵被鍨嬫寚閽堬紝鏄剧ず涓㈠純杩愮畻缁撴灉銆傦紙C89鏍囧噯鏂板锛塩har锛氬瓧绗﹀瀷绫诲瀷鏁版嵁锛屽睘浜庢暣鍨嬫暟鎹殑涓绉嶃傦紙K&R鏃舵湡寮曞叆锛塱nt锛氭暣鍨嬫暟鎹紝琛ㄧず鑼冨洿閫氬父涓虹紪璇戝櫒鎸囧畾鐨勫唴瀛...
绛旓細c璇█鏄%if瀵瑰簲double锛%f瀵瑰簲float銆俿canf()锛氣%lf鈥濈敤浜巇ouble绫诲瀷锛屸%f鈥濈敤浜巉loat绫诲瀷printf()锛氣%f鈥濇棦鍙敤浜巇ouble绫诲瀷锛屼篃鍙敤浜巉loat绫诲瀷锛屾剰鎬濇槸鎸団滀繚鐣6浣嶅皬鏁扳濄f鍜%lf鍒嗗埆鏄痜loat绫诲瀷鍜宒ouble绫诲瀷鐢ㄤ簬鏍煎紡鍖栬緭鍏ヨ緭鍑烘椂瀵瑰簲鐨鏍煎紡绗﹀彿銆傚叾涓細float锛屽崟绮惧害娴偣鍨嬶紝瀵瑰簲%f銆俤ouble锛屽弻绮惧害...
绛旓細f 鑸搴斿崟绮惧害绫诲瀷 float lf 鑸搴斿弻绮惧害绫诲瀷 double f鏄崟绮惧害娴偣鍨嬶紝杈撳嚭鐨勬椂鍊欒婊¤冻6浣嶅皬鏁般俵f灏辨槸杈撳嚭鏁板兼婚暱搴︿负L,鏁存暟涓暟鍔犲皬鏁颁釜鏁,涓嶈冻琛ョ┖,鍙抽《鏍艰捣
绛旓細鏈绠鍗鐨勫尯鍒:f 涓鑸搴斿崟绮惧害绫诲瀷 float lf 涓鑸搴斿弻绮惧害绫诲瀷 double銆
绛旓細1銆%f 鏄緭鍑 float 鍨嬪彉閲锛%f 鏄緭鍑 double 鍨嬪彉閲忥紱%Lf 鏄緭鍑 long double 鍨嬪彉閲忋2銆佸湪C璇█涓紝瀵逛簬鏁板肩被鍨嬪彧鏈夐氳繃printf绫诲嚱鏁拌緭鍑鸿繖涓绉嶆柟寮忥紝姣斿printf, sprintf, fprintf绛夈傝繖绫诲嚱鏁拌緭鍑烘椂瑕佹眰鏈夋牸寮忕鍙凤紝鍏朵腑long double鐨勬牸寮忕鍙蜂负%Lf浠ヤ笅鏄竴涓畝鍗曠殑鍙傝冧唬鐮侊紝杈撳嚭鍒版爣鍑嗚緭鍑鸿澶...
绛旓細1.鍙岀簿搴︽诞鐐瑰瀷鏁版嵁鐢%lf杈撳嚭銆傚洜涓篸ouble鏄8涓瓧鑺鐨锛宖loat鏄4涓瓧鑺傜殑锛%f 鐨勬牸寮忓氨鏄4涓瓧鑺傜殑锛岃 %lf 灏辨槸8涓瓧鑺傜殑銆 渚嬪锛歱rintf("%lf\n",x);2.short 鍗犵敤鍐呭瓨绌洪棿2涓瓧鑺傦紝鐭暣鍨嬫暟鎹敤%d杈撳嚭 渚嬪锛歱rintf("%d\n",a);渚嬶細include <stdio.h> int main(){double x;short...
