一个C语言中的long型小问题 C语言中输出long long型数据怎么输出
\u5173\u4e8eC\u8bed\u8a00\u4e2d\u7684long long \u7684\u95ee\u9898signed char\u6709\u7b26\u53f7\u5b57\u8282\uff0c\u8868\u793a\u8303\u56f4\u662f-128~127\uff0c
unsigned char\u662f\u65e0\u7b26\u53f7\u5b57\u8282\uff0c\u8868\u793a\u8303\u56f4\u662f0~255\u3002
long long\u662f\u6709\u7b26\u53f7\u957f\u6574\u5f62\uff0c\u8868\u793a\u8303\u56f4\u662f-2^63~2^63-1\u3002
signed char\uff0cunsigned char\u90fd\u662f\u663e\u5f0f\u58f0\u660e\u7684\u6709\u7b26\u53f7/\u65e0\u7b26\u53f7\uff0c\u800cchar\u53ef\u80fd\u662f\u4e8c\u8005\u5176\u4e2d\u4e4b\u4e00\uff0c\u7531\u7f16\u8bd1\u5668\u51b3\u5b9a\u3002\u5c31\u662f\u8bf4\uff0c\u5982\u679c\u4f60\u5199char\uff0c\u6709\u53ef\u80fd\u662fsigned\u7684\uff0c\u4e5f\u6709\u53ef\u80fd\u662funsigned\u7684\u3002\u4f46\u662f\u7edd\u5927\u591a\u6570\u7f16\u8bd1\u5668\u662f\u9ed8\u8ba4\u4e3asigned\u7684\u3002
\u503c\u5f97\u6ce8\u610f\u7684\u662f\uff0c\u4e0a\u9762\u8bb2\u7684\u662f\u8868\u793a\u8303\u56f4\uff0c\u4f46\u662f\u65e0\u8bba\u662fC\u8fd8\u662fC++\uff0csigned char\u3001unsigned char\u3001char\u662f\u4e09\u79cd\u4e0d\u540c\u7684\u7c7b\u578b\u3002\u51fa\u73b0\u8fd9\u79cd\u60c5\u51b5\u53ef\u4ee5\u5f52\u7ed3\u4e3a\u5386\u53f2\u539f\u56e0\u3002\u65e9\u671fC\u6ca1\u6709\u4e13\u7528\u4e8e\u7b97\u672f\u8fd0\u7b97\u7684\u5355\u5b57\u8282\u6574\u6570\u7c7b\u578b\uff0c\u5b9e\u73b0\u4e2d\u4e5f\u65e0\u6cd5\u4fdd\u8bc1char\u4f7f\u7528\u4ec0\u4e48\u7b26\u53f7\uff08\u4e0d\u540c\u7b26\u53f7\u8f6c\u6362\u4e3a\u8d85\u8fc7\u4e00\u4e2a\u5b57\u8282\u7684\u6574\u6570\u7c7b\u578b\u65f6\u5404\u4e2a\u786c\u4ef6\u5e73\u53f0\u7684\u6548\u7387\u6709\u5dee\u5f02\uff09\u3002\u540e\u6765\u624d\u8ffd\u52a0signed char\u548cunsigned char\u3002\u5176\u7b26\u53f7\u662fimplementation-defined\u3002
\u4f8b\u5b50\uff1a
#include int main(){signed char a = 255;unsigned char b = 255;char c = 255;long long d = 100000000000;long e = 100000000000;printf("%d\n", a);printf("%d\n", b);printf("%d\n", c);printf("%lld\n", d);printf("%d\n", e);return 0;}\u7ed3\u679c\uff1a
\u53ef\u4ee5\u53d1\u73b0\u53ef\u4ee5\u5bb9\u7eb3\u7684\u5927\u5c0f\u662f\u4e0d\u540c\u7684\u3002
\u5176\u4e2da,c,e\u53d1\u751f\u4e86\u6ea2\u51fa\uff0c\u4ea7\u751f\u4e86\u4e0d\u6b63\u786e\u7684\u7ed3\u679c\u3002
C\u8bed\u8a00\u4e2d\u8f93\u51falong long\u578b\u6570\u636e\u4f7f\u7528%lld\u683c\u5f0f\u8f93\u51fa\u7684\u65b9\u6cd5\uff1a
1\u3001 long long \u662fC99\u6807\u51c6\u5bf9\u6574\u578b\u7c7b\u578b\u505a\u7684\u6269\u5c55\uff0c\u6bcf\u4e2along long\u7c7b\u578b\u7684\u53d8\u91cf\u53608\u5b57\u8282\uff0c64\u4f4d\u3002\u5176\u8868\u793a\u8303\u56f4\u4e3a-9223372036854775808~9223372036854775807\u3002
2\u3001long long \u7c7b\u578b\u8f93\u51fa\u7684\u65f6\u5019\uff0c\u9700\u8981\u7528printf\u51fd\u6570\uff0c\u7528%lld\u683c\u5f0f\u8f93\u51fa\u3002 \u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1along long a = 1234;printf("a=%lld\n", a)\u3002
3\u3001\u8f93\u51fa\u7684\u5404\u79cd\u53ef\u7528\u4e8e%d\u4e0a\u7684\u683c\u5f0f\u63a7\u5236\uff0c\u5747\u53ef\u7528\u4e8e%lld\u4e0a\uff0c\u6bd4\u5982%10lld,\u8868\u793a\u8f93\u51fa\u5360\u5341\u4f4d\u5bbd\u5ea6\u7b49\u3002
\u6269\u5c55\u8d44\u6599\uff1a
C\u8bed\u8a00\u57fa\u672c\u7279\u6027
1\u3001\u9ad8\u7ea7\u8bed\u8a00\uff1a\u5b83\u662f\u628a\u9ad8\u7ea7\u8bed\u8a00\u7684\u57fa\u672c\u7ed3\u6784\u548c\u8bed\u53e5\u4e0e\u4f4e\u7ea7\u8bed\u8a00\u7684\u5b9e\u7528\u6027\u7ed3\u5408\u8d77\u6765\u7684\u5de5\u4f5c\u5355\u5143\u3002 [11]
2\u3001\u7ed3\u6784\u5f0f\u8bed\u8a00\uff1a\u7ed3\u6784\u5f0f\u8bed\u8a00\u7684\u663e\u8457\u7279\u70b9\u662f\u4ee3\u7801\u53ca\u6570\u636e\u7684\u5206\u9694\u5316\uff0c\u5373\u7a0b\u5e8f\u7684\u5404\u4e2a\u90e8\u5206\u9664\u4e86\u5fc5\u8981\u7684\u4fe1\u606f\u4ea4\u6d41\u5916\u5f7c\u6b64\u72ec\u7acb\u3002\u8fd9\u79cd\u7ed3\u6784\u5316\u65b9\u5f0f\u53ef\u4f7f\u7a0b\u5e8f\u5c42\u6b21\u6e05\u6670\uff0c\u4fbf\u4e8e\u4f7f\u7528\u3001\u7ef4\u62a4\u4ee5\u53ca\u8c03\u8bd5\u3002
C \u8bed\u8a00\u662f\u4ee5\u51fd\u6570\u5f62\u5f0f\u63d0\u4f9b\u7ed9\u7528\u6237\u7684\uff0c\u8fd9\u4e9b\u51fd\u6570\u53ef\u65b9\u4fbf\u7684\u8c03\u7528\uff0c\u5e76\u5177\u6709\u591a\u79cd\u5faa\u73af\u3001\u6761\u4ef6\u8bed\u53e5\u63a7\u5236\u7a0b\u5e8f\u6d41\u5411\uff0c\u4ece\u800c\u4f7f\u7a0b\u5e8f\u5b8c\u5168\u7ed3\u6784\u5316\u3002
3\u3001\u4ee3\u7801\u7ea7\u522b\u7684\u8de8\u5e73\u53f0\uff1a\u7531\u4e8e\u6807\u51c6\u7684\u5b58\u5728\uff0c\u4f7f\u5f97\u51e0\u4e4e\u540c\u6837\u7684C\u4ee3\u7801\u53ef\u7528\u4e8e\u591a\u79cd\u64cd\u4f5c\u7cfb\u7edf\uff0c\u5982Windows\u3001DOS\u3001UNIX\u7b49\u7b49\uff1b\u4e5f\u9002\u7528\u4e8e\u591a\u79cd\u673a\u578b\u3002C\u8bed\u8a00\u5bf9\u7f16\u5199\u9700\u8981\u8fdb\u884c\u786c\u4ef6\u64cd\u4f5c\u7684\u573a\u5408\uff0c\u4f18\u4e8e\u5176\u5b83\u9ad8\u7ea7\u8bed\u8a00\u3002
4\u3001\u4f7f\u7528\u6307\u9488\uff1a\u53ef\u4ee5\u76f4\u63a5\u8fdb\u884c\u9760\u8fd1\u786c\u4ef6\u7684\u64cd\u4f5c\uff0c\u4f46\u662fC\u7684\u6307\u9488\u64cd\u4f5c\u4e0d\u505a\u4fdd\u62a4\uff0c\u4e5f\u7ed9\u5b83\u5e26\u6765\u4e86\u5f88\u591a\u4e0d\u5b89\u5168\u7684\u56e0\u7d20\u3002C++\u5728\u8fd9\u65b9\u9762\u505a\u4e86\u6539\u8fdb\uff0c\u5728\u4fdd\u7559\u4e86\u6307\u9488\u64cd\u4f5c\u7684\u540c\u65f6\u53c8\u589e\u5f3a\u4e86\u5b89\u5168\u6027\uff0c\u53d7\u5230\u4e86\u4e00\u4e9b\u7528\u6237\u7684\u652f\u6301\uff0c\u4f46\u662f\uff0c\u7531\u4e8e\u8fd9\u4e9b\u6539\u8fdb\u589e\u52a0\u8bed\u8a00\u7684\u590d\u6742\u5ea6\uff0c\u4e5f\u4e3a\u53e6\u4e00\u90e8\u5206\u6240\u8bdf\u75c5\u3002
Java\u5219\u5438\u53d6\u4e86C++\u7684\u6559\u8bad\uff0c\u53d6\u6d88\u4e86\u6307\u9488\u64cd\u4f5c\uff0c\u4e5f\u53d6\u6d88\u4e86C++\u6539\u8fdb\u4e2d\u4e00\u4e9b\u5907\u53d7\u4e89\u8bae\u7684\u5730\u65b9\uff0c\u5728\u5b89\u5168\u6027\u548c\u9002\u5408\u6027\u65b9\u9762\u5747\u53d6\u5f97\u826f\u597d\u7684\u6548\u679c\uff0c\u4f46\u5176\u672c\u8eab\u89e3\u91ca\u5728\u865a\u62df\u673a\u4e2d\u8fd0\u884c\uff0c\u8fd0\u884c\u6548\u7387\u4f4e\u4e8eC++/C\u3002\u4e00\u822c\u800c\u8a00\uff0cC\uff0cC++\uff0cjava\u88ab\u89c6\u4e3a\u540c\u4e00\u7cfb\u7684\u8bed\u8a00\uff0c\u5b83\u4eec\u957f\u671f\u5360\u636e\u7740\u7a0b\u5e8f\u4f7f\u7528\u699c\u7684\u524d\u4e09\u540d\u3002 [
\u7279\u6709\u7279\u70b9
1\u3001C\u8bed\u8a00\u662f\u4e00\u4e2a\u6709\u7ed3\u6784\u5316\u7a0b\u5e8f\u8bbe\u8ba1\u3001\u5177\u6709\u53d8\u91cf\u4f5c\u7528\u57df\uff08variable scope\uff09\u4ee5\u53ca\u9012\u5f52\u529f\u80fd\u7684\u8fc7\u7a0b\u5f0f\u8bed\u8a00\u3002
2\u3001C\u8bed\u8a00\u4f20\u9012\u53c2\u6570\u5747\u662f\u4ee5\u503c\u4f20\u9012\uff08pass by value\uff09\uff0c\u53e6\u5916\u4e5f\u53ef\u4ee5\u4f20\u9012\u6307\u9488\uff08a pointer passed by value\uff09\u3002
3\u3001\u4e0d\u540c\u7684\u53d8\u91cf\u7c7b\u578b\u53ef\u4ee5\u7528\u7ed3\u6784\u4f53\uff08struct\uff09\u7ec4\u5408\u5728\u4e00\u8d77\u3002
4\u3001\u53ea\u670932\u4e2a\u4fdd\u7559\u5b57\uff08reserved keywords\uff09\uff0c\u4f7f\u53d8\u91cf\u3001\u51fd\u6570\u547d\u540d\u6709\u66f4\u591a\u5f39\u6027\u3002
5\u3001\u90e8\u4efd\u7684\u53d8\u91cf\u7c7b\u578b\u53ef\u4ee5\u8f6c\u6362\uff0c\u4f8b\u5982\u6574\u578b\u548c\u5b57\u7b26\u578b\u53d8\u91cf\u3002
6\u3001\u901a\u8fc7\u6307\u9488\uff08pointer\uff09\uff0cC\u8bed\u8a00\u53ef\u4ee5\u5bb9\u6613\u7684\u5bf9\u5b58\u50a8\u5668\u8fdb\u884c\u4f4e\u7ea7\u63a7\u5236\u3002
7\u3001\u9884\u7f16\u8bd1\u5904\u7406\uff08preprocessor\uff09\u8ba9C\u8bed\u8a00\u7684\u7f16\u8bd1\u66f4\u5177\u6709\u5f39\u6027\u3002
\u53c2\u8003\u8d44\u6599\uff1a\u767e\u5ea6\u767e\u79d1-C\u8bed\u8a00
比如无符号的时候可以写成48u
Long型常数
表示长整型常量
说明是长整形的意思
long e = 32L; //代表32为 long 型
float f = 32F; //代表32为 float 型
绛旓細鏄暱鏁存暟鐨勬剰鎬濄傝繖涓槸涓轰簡绐佺劧鏁版嵁鐨绫诲瀷锛堣鏁版嵁鏇存槑纭紝涔熷彲浠ヤ笉鍐欙級姣斿鏃犵鍙风殑鏃跺欏彲浠ュ啓鎴48u
绛旓細1銆乼ypedef鐨勬渶绠鍗曚娇鐢 typedef long byte_4;缁欏凡鐭ユ暟鎹绫诲瀷long璧蜂釜鏂板悕瀛楋紝鍙玝yte_4銆2銆 typedef涓庣粨鏋勭粨鍚堜娇鐢 typedef struct tagMyStruct { int iNum;long lLength;} MyStruct;杩欒鍙ュ疄闄呬笂瀹屾垚涓や釜鎿嶄綔锛1) 瀹氫箟涓涓柊鐨勭粨鏋勭被鍨 struct tagMyStruct { int iNum;long lLength;};鍒嗘瀽锛歵ag...
绛旓細鎶妏rintf涓殑%d鏀逛负%lld 銆傝緭鍑long long鏁村瀷鏁版嵁鏃跺彂鐜拌緭鍑轰负璐熸暟锛屼絾debug妯″紡寮鍚悗鍙戠幇鍙橀噺鐨勫兼槸娌￠敊鐨勶紝浜庢槸鎶婇棶棰樺畾浣嶅埌杈撳嚭鏍煎紡涓 瑙ｅ喅鏂规硶锛氭妸printf涓殑%d鏀逛负%lld
绛旓細unsigned char鏄棤绗﹀彿瀛楄妭锛岃〃绀鸿寖鍥存槸0~255銆long long鏄湁绗﹀彿闀挎暣褰紝琛ㄧず鑼冨洿鏄-2^63~2^63-1銆俿igned char锛寀nsigned char閮芥槸鏄惧紡澹版槑鐨勬湁绗﹀彿/鏃犵鍙凤紝鑰宑har鍙兘鏄簩鑰呭叾涓箣涓锛岀敱缂栬瘧鍣ㄥ喅瀹氥傚氨鏄锛屽鏋滀綘鍐檆har锛屾湁鍙兘鏄痵igned鐨勶紝涔熸湁鍙兘鏄痷nsigned鐨勩備絾鏄粷澶у鏁扮紪璇戝櫒鏄粯璁や负sign...
绛旓細鍊掑 瀹氫箟鍙橀噺 int i=12345锛涗綘闄や互10000鐨勫晢灏辨槸绗竴浣 i/10000 浣犻櫎浠10000鐨勪綑鏁伴櫎浠1000鐨勫晢灏辨槸绗2浣 (i%10000)/1000 浣犻櫎浠1000鐨勪綑鏁伴櫎浠100鐨勫晢灏辨槸绗3浣(i%1000)/100 浣犻櫎浠100鐨勪綑鏁伴櫎浠10鐨勫晢灏辨槸绗4浣(i%100)/10 浣犻櫎浠10鐨勪綑鏁板氨鏄5浣 i%10 ...
绛旓細鏀规垚锛歩nclude <stdio.h> main(){ long x,y,m;printf("Please input x and y\n");scanf("%ld%ld",&x,&y);m=x*y;printf("%ld * %ld = %ld\n",x,y,m);} 鍥犱负浣犲畾涔夌殑x,y鏄暱鏁村瀷锛屾墍浠ヤ綘浠庨敭鐩樿緭鍏ユ椂涔熷簲璇ヤ负闀挎暣鍨嬫墠琛屽晩锛屾墍浠ュ簲璇ユ敼鎴愪笂闈㈢殑鑲畾灏卞彲浠ヤ簡锛屼綘璇曡瘯锛
绛旓細C璇█涓杈撳嚭long long鍨鏁版嵁浣跨敤%lld鏍煎紡杈撳嚭鐨勬柟娉曪細1銆 long long 鏄疌99鏍囧噯瀵规暣鍨嬬被鍨嬪仛鐨勬墿灞曪紝姣忎釜long long绫诲瀷鐨鍙橀噺鍗8瀛楄妭锛64浣嶃傚叾琛ㄧず鑼冨洿涓-9223372036854775808~9223372036854775807銆2銆乴ong long 绫诲瀷杈撳嚭鐨勬椂鍊欙紝闇瑕佺敤printf鍑芥暟锛岀敤%lld鏍煎紡杈撳嚭銆 绀轰緥浠ｇ爜濡備笅锛歭ong long a = 1234;...
绛旓細鍛靛懙锛宨nt绔欑殑鏄竴涓満鍣ㄥ瓧锛屽氨鏄鏍规嵁鐢佃剳纭欢鐨勪笉鍚岃屼笉鍚岋紝鍏充簬鏈哄櫒瀛楁槸浠涔堬紵鏌ヤ竴涓嬪氨鐭ラ亾鍟︺long鍦16寰満涓婃庝箞鍗32浣嶏紝杩欎釜寰堝鏄撳疄鐜帮紝鐪嬭繃寰満鍘熺悊鐨勯兘鐭ラ亾锛屽彲浠ュ埄鐢ㄩ珮鍦颁綅鍘诲瓨銆
绛旓細C璇█鐨int绫诲瀷涓庡紑鍙戠幆澧冨钩鍙版湁鍏筹紝鍙兘鏄16浣嶏紙2^16锛,涔熷彲鑳芥槸32浣嶏紙2^32锛夊鏋滀綘鐨勬孩鍑轰簡锛屽彲浠ヨ瘯璇long鍨 long a;a = 1*2*3*4*5*6*7*8*9;printf("%d",a);杩欐牱鏄偗瀹氬彲浠ョ殑 鎴戝湪鎴戠數鑴戜笂鐢╥nt璇曚簡锛屾垜鐨勬病闂
绛旓細褰揵涓long int鏃,濡傛灉鏄64浣岰PU,鍒檒ong int闀垮害涓8瀛楄妭,杩欐椂瀹為檯鏁版嵁鐨勪綆瀛楄妭搴旇瀛樻斁鍦╞7涓,鏈楂樺瓧鑺傚瓨鏀惧湪b0涓.鍙槸浣犵殑scanf璇彞鐨勫弬鏁扮‘灏哹褰撴垚鏁存暟绫诲瀷,杈撳叆鐨勬暟鎹綆瀛楄妭涓嶆槸瀛樻斁鍦╞7鍙槸瀛樺偍鍦╞3,缁撴灉鏈潵搴旇鏄痓7=23 b0=b1=...b6 = 0,鍙槸浣犵殑閿欒瀵艰嚧浜哹3=23,b0=b1=b2=0, b4,b5...
