C语言if函数的运用？ c语言 if()函数式如何实现的？
C\u8bed\u8a00if\u51fd\u6570\u7684\u7528\u6cd5\u3000\u3000IF\u51fd\u6570\u4e00\u822c\u662f\u6307Excel\u4e2d\u7684IF\u51fd\u6570\uff0c\u6839\u636e\u6307\u5b9a\u7684\u6761\u4ef6\u6765\u5224\u65ad\u5176\u201c\u771f\u201d\uff08TRUE\uff09\u3001\u201c\u5047\u201d\uff08FALSE\uff09\uff0c\u6839\u636e\u903b\u8f91\u8ba1\u7b97\u7684\u771f\u5047\u503c\uff0c\u4ece\u800c\u8fd4\u56de\u76f8\u5e94\u7684\u5185\u5bb9\u3002\u53ef\u4ee5\u4f7f\u7528\u51fd\u6570 IF \u5bf9\u6570\u503c\u548c\u516c\u5f0f\u8fdb\u884c\u6761\u4ef6\u68c0\u6d4b\u3002
\u3000\u3000\u51fd\u6570\u8bed\u6cd5\uff1a
\u3000\u3000IF(logical_test,value_if_true,value_if_false)
\u3000\u3000Logical_test \u8868\u793a\u8ba1\u7b97\u7ed3\u679c\u4e3a TRUE \u6216 FALSE \u7684\u4efb\u610f\u503c\u6216\u8868\u8fbe\u5f0f\u3002
\u3000\u3000\u4f8b\u5982\uff0cA10=100 \u5c31\u662f\u4e00\u4e2a\u903b\u8f91\u8868\u8fbe\u5f0f\uff0c\u5982\u679c\u5355\u5143\u683c A10 \u4e2d\u7684\u503c\u7b49\u4e8e 100\uff0c\u8868\u8fbe\u5f0f\u5373\u4e3a TRUE\uff0c\u5426\u5219\u4e3a FALSE\u3002\u672c\u53c2\u6570\u53ef\u4f7f\u7528\u4efb\u4f55\u6bd4\u8f83\u8fd0\u7b97\u7b26\uff08\u4e00\u4e2a\u6807\u8bb0\u6216\u7b26\u53f7\uff0c\u6307\u5b9a\u8868\u8fbe\u5f0f\u5185\u6267\u884c\u7684\u8ba1\u7b97\u7684\u7c7b\u578b\u3002\u6709\u6570\u5b66\u3001\u6bd4\u8f83\u3001\u903b\u8f91\u548c\u5f15\u7528\u8fd0\u7b97\u7b26\u7b49\u3002\uff09\u3002
\u3000\u3000Value_if_true logical_test \u4e3a TRUE \u65f6\u8fd4\u56de\u7684\u503c\u3002
\u3000\u3000\u4f8b\u5982\uff0c\u5982\u679c\u672c\u53c2\u6570\u4e3a\u6587\u672c\u5b57\u7b26\u4e32\u201c\u9884\u7b97\u5185\u201d\u800c\u4e14 logical_test \u53c2\u6570\u503c\u4e3a TRUE\uff0c\u5219 IF \u51fd\u6570\u5c06\u663e\u793a\u6587\u672c\u201c\u9884\u7b97\u5185\u201d\u3002\u5982\u679c logical_test \u4e3a TRUE \u800c value_if_true \u4e3a\u7a7a\uff0c\u5219\u672c\u53c2\u6570\u8fd4\u56de 0\uff08\u96f6\uff09\u3002\u5982\u679c\u8981\u663e\u793a TRUE\uff0c\u5219\u8bf7\u4e3a\u672c\u53c2\u6570\u4f7f\u7528\u903b\u8f91\u503c TRUE\u3002value_if_true \u4e5f\u53ef\u4ee5\u662f\u5176\u4ed6\u516c\u5f0f\u3002
\u3000\u3000Value_if_false logical_test \u4e3a FALSE \u65f6\u8fd4\u56de\u7684\u503c\u3002
\u3000\u3000\u4f8b\u5982\uff0c\u5982\u679c\u672c\u53c2\u6570\u4e3a\u6587\u672c\u5b57\u7b26\u4e32\u201c\u8d85\u51fa\u9884\u7b97\u201d\u800c\u4e14 logical_test \u53c2\u6570\u503c\u4e3a FALSE\uff0c\u5219 IF \u51fd\u6570\u5c06\u663e\u793a\u6587\u672c\u201c\u8d85\u51fa\u9884\u7b97\u201d\u3002\u5982\u679c logical_test \u4e3a FALSE \u4e14\u5ffd\u7565\u4e86 value_if_false\uff08\u5373 value_if_true \u540e\u6ca1\u6709\u9017\u53f7\uff09\uff0c\u5219\u4f1a\u8fd4\u56de\u903b\u8f91\u503c FALSE\u3002\u5982\u679c logical_test \u4e3a FALSE \u4e14 value_if_false \u4e3a\u7a7a\uff08\u5373 value_if_true \u540e\u6709\u9017\u53f7\uff0c\u5e76\u7d27\u8ddf\u7740\u53f3\u62ec\u53f7\uff09\uff0c\u5219\u672c\u53c2\u6570\u8fd4\u56de 0\uff08\u96f6\uff09\u3002VALUE_if_false \u4e5f\u53ef\u4ee5\u662f\u5176\u4ed6\u516c\u5f0f\u3002
\u3000\u3000\u8bf4\u660e\uff1a
\u3000\u3000\u00b7\u5728EXCEL2003\u4e2d \u51fd\u6570 IF \u53ef\u4ee5\u5d4c\u5957\u4e03\u5c42\uff0c\u5728EXCEL2007\u4e2d\u53ef\u4ee5\u5d4c\u5957256\u5c42\uff0c\u7528 value_if_false \u53ca value_if_true \u53c2\u6570\u53ef\u4ee5\u6784\u9020\u590d\u6742\u7684\u68c0\u6d4b\u6761\u4ef6\u3002
\u3000\u3000\u00b7 \u5728\u8ba1\u7b97\u53c2\u6570 value_if_true \u548c value_if_false \u540e\uff0c\u51fd\u6570 IF \u8fd4\u56de\u76f8\u5e94\u8bed\u53e5\u6267\u884c\u540e\u7684\u8fd4\u56de\u503c\u3002
\u3000\u3000\u00b7 \u5982\u679c\u51fd\u6570 IF \u7684\u53c2\u6570\u5305\u542b\u6570\u7ec4\uff08 \u7528\u4e8e\u5efa\u7acb\u53ef\u751f\u6210\u591a\u4e2a\u7ed3\u679c\u6216\u53ef\u5bf9\u5728\u884c\u548c\u5217\u4e2d\u6392\u5217\u7684\u4e00\u7ec4\u53c2\u6570\u8fdb\u884c\u8fd0\u7b97\u7684\u5355\u4e2a\u516c\u5f0f\u3002\u6570\u7ec4\u533a\u57df\u5171\u7528\u4e00\u4e2a\u516c\u5f0f\uff1b\u6570\u7ec4\u5e38\u91cf\u662f\u7528\u4f5c\u53c2\u6570\u7684\u4e00\u7ec4\u5e38\u91cf\uff09\uff0c\u5219\u5728\u6267\u884c IF \u8bed\u53e5\u65f6\uff0c\u6570\u7ec4\u4e2d\u7684\u6bcf\u4e00\u4e2a\u5143\u7d20\u90fd\u5c06\u8ba1\u7b97\u3002
\u3000\u3000\u00b7 WPS\u8868\u683c \u8fd8\u63d0\u4f9b\u4e86\u5176\u4ed6\u4e00\u4e9b\u51fd\u6570\uff0c\u53ef\u4f9d\u636e\u6761\u4ef6\u6765\u5206\u6790\u6570\u636e\u3002\u4f8b\u5982\uff0c\u5982\u679c\u8981\u8ba1\u7b97\u5355\u5143\u683c\u533a\u57df\u4e2d\u67d0\u4e2a\u6587\u672c\u5b57\u7b26\u4e32\u6216\u6570\u5b57\u51fa\u73b0\u7684\u6b21\u6570\uff0c\u5219\u53ef\u4f7f\u7528 COUNTIf \u5de5\u4f5c\u8868\u51fd\u6570\u3002\u5982\u679c\u8981\u6839\u636e\u5355\u5143\u683c\u533a\u57df\u4e2d\u7684\u67d0\u4e00\u6587\u672c\u5b57\u7b26\u4e32\u6216\u6570\u5b57\u6c42\u548c\uff0c\u5219\u53ef\u4f7f\u7528 SUMIf \u5de5\u4f5c\u8868\u51fd\u6570\u3002\u8bf7\u4e86\u89e3\u5173\u4e8e\u6839\u636e\u6761\u4ef6\u8ba1\u7b97\u503c\u3002
\u3000\u3000\u00b7\u5982\u679c\u5224\u65ad\u6807\u51c6\u6709\u6c49\u5b57\u5185\u5bb9\uff0c\u5219\u5728\u6c49\u5b57\u524d\u540e\u52a0\u4e0a\u82f1\u6587\u72b6\u6001\u4e0b\u7684\u53cc\u5f15\u53f7""G2
\u3000\u3000\uff08\u4f8b\u5982\uff1aIF(G2="\u6210\u90fd",400,200))
\u3000\u3000\u51fd\u6570\u793a\u4f8b\uff1a
\u3000\u30001 \u6570\u636e
\u3000\u30002 50
\u3000\u3000\u516c\u5f0f\uff1a=IF(A2<=100,"Withinbudget","Overbudget")
\u3000\u3000\u8bf4\u660e\uff08\u7ed3\u679c\uff09\uff1a\u5982\u679c\u4e0a\u9762\u7684\u6570\u5b57\u5c0f\u4e8e\u7b49\u4e8e100\uff0c\u5219\u516c\u5f0f\u5c06\u663e\u793a\u201cWithinbudget\u201d\u3002\u5426\u5219\uff0c\u516c\u5f0f\u663e\u793a\u201cOverbudget\u201d\u3002(Withinbudget)
\u3000\u3000\u516c\u5f0f\uff1a=IF(A2=100,SUM(B5:B15),"")
\u3000\u3000\u8bf4\u660e\uff08\u7ed3\u679c\uff09\uff1a\u5982\u679c\u4e0a\u9762\u6570\u5b57\u4e3a100\uff0c\u5219\u8ba1\u7b97\u5355\u5143\u683c\u533a\u57dfB5:B15\uff0c\u5426\u5219\u8fd4\u56de\u7a7a\u6587\u672c("")
\u3000\u3000
if\u8bed\u53e5\u7684\u4e00\u822c\u5f62\u5f0f\u5982\u4e0b\uff1a
if\uff08\u8868\u8fbe\u5f0f\uff09\u8bed\u53e51
[else\u8bed\u53e52]
if\u8bed\u53e5\u4e2d\u7684\u201c\u8868\u8fbe\u5f0f\u201d\u53ef\u4ee5\u662f\u5173\u7cfb\u8868\u8fbe\u5f0f\u3001\u903b\u8f91\u8868\u8fbe\u5f0f\uff0c\u751a\u81f3\u662f\u6570\u503c\u8868\u8fbe\u5f0f\u3002\u5176\u4e2d\u6700\u76f4\u89c2\u3001\u6700\u5bb9\u6613\u7406\u89e3\u7684\u662f\u5173\u7cfb\u8868\u8fbe\u5f0f\u3002\u6240\u8c13\u5173\u7cfb\u8868\u8fbe\u5f0f\u5c31\u662f\u4e24\u4e2a\u6570\u503c\u8fdb\u884c\u6bd4\u8f83\u7684\u5f0f\u5b50\u3002
\u4f8b\u5982\uff1a
if\uff08x>y)
printf("%d",x);
else
printf("%d",y);
\u6269\u5c55\u8d44\u6599
if-else\u8bed\u53e5\u5f15\u5165\u4e86\u4e00\u79cd\u4e8c\u4e49\u6027\u95ee\u9898\u79f0\u4e3a\u7a7a\u60acelse\uff08dangling-else\uff09\u95ee\u9898\uff0c\u8fd9\u79cd\u95ee\u9898\u51fa\u73b0\u5728\u5f53if\u5b50\u53e5\u591a\u4e8eelse\u5b50\u53e5\u65f6\u3002\u95ee\u9898\u662f\u8fd9\u4e9belse\u5b50\u53e5\u5206\u522b\u548c\u54ea\u4e00\u4e2aif\u5b50\u53e5\u5339\u914d\u3002
\u4f8b\u5982\uff1a
if(minVal<=ivec[i])
if(minVal==ivec[i])
++occurs;
else
{
minVal=ivec[i];
occurs=1;
}
#include <stdio.h>
int main()
{ float x,y;
scanf("%f",&x);
if(x>=5)
y=2*x;
else if(x>=0)
y=2*x+1;
else
y=2*x-1;
printf("%f
",y);
return 0;
}
您好，很荣幸回答您的问题。
#include <stdio.h>
int main()
{ double x,y;
scanf("%lf",&x);
if(x>=5)y=2*x;
else if(x>=0)y=2*x+1;
else y=2*x-1;
printf("%f\n",y);
return 0;
}
绛旓細c璇█鐨刬f鍑芥暟鐨勪娇鐢 if鍑芥暟涓昏鐢ㄤ簬C璇█涓殑鏉′欢鍒ゆ柇锛屽垽鏂潯浠朵负鐪熷垯鎵цif璇彞涓殑浠ｇ爜鍧楋紝鍚﹀垯鎵цelse璇彞涓殑浠ｇ爜鍧銆傚叿浣撲娇鐢ㄦ柟娉曞涓嬶細if(鏉′欢琛ㄨ揪寮){鎵ц璇彞锛泒else{鎵ц璇彞锛泒鍏朵腑锛屾潯浠惰〃杈惧紡涓洪渶瑕佽繘琛屽垽鏂殑鏉′欢锛屽鏋滀负鐪燂紝鍒欐墽琛宨f鍧椾腑鐨勮鍙ワ紱濡傛灉涓哄亣锛屽垯鎵цelse鍧椾腑鐨勮鍙ャ傞渶瑕...
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绛旓細IF鍑芥暟涓鑸槸鎸嘐xcel涓殑IF鍑芥暟锛鏍规嵁鎸囧畾鐨勬潯浠舵潵鍒ゆ柇鍏垛滅湡鈥(TRUE)銆佲滃亣鈥(FALSE)锛屾牴鎹昏緫璁＄畻鐨勭湡鍋囧硷紝浠庤岃繑鍥炵浉搴旂殑鍐呭銆傚彲浠ヤ娇鐢ㄥ嚱鏁 IF 瀵规暟鍊煎拰鍏紡杩涜鏉′欢妫娴嬨俢璇█鍑芥暟if鐨勭敤娉曪細鍑芥暟璇硶 IF(logical_test,value_if_true,value_if_false)Logical_test 琛ㄧず璁＄畻缁撴灉涓 TRUE 鎴 FALSE...
绛旓細1銆乮f锛堣〃杈惧紡锛夎鍙銆備緥濡傦細if锛坸>y锛塸rintf("%d",x);姝ゆ椂锛屽鏋滆〃杈惧紡涓虹湡锛屽垯鎵цprintf璇彞銆2銆乮f锛堣〃杈惧紡锛夎鍙1 else 璇彞2 渚嬪锛歩f锛坸>y)printf("%d",x);else printf("%d",y);姝ゆ椂锛屽鏋渪>y鎴愮珛涓虹湡锛屽垯鎵ц璇彞printf("%d",x)锛岀劧鍚庣洿鎺ヨ烦杩噀lse锛屽悓鏃朵篃璺宠繃璇彞printf("%d",...
绛旓細include <stdio.h>int main(){ float x,y;scanf("%f",&x);if(x>=5)y=2*x;else if(x>=0)y=2*x+1;elsey=2*x-1;printf("%f\n",y);return 0;}
绛旓細璇村疄璇濓紝绗竴绉嶅啓娉曟槸涓嶈鎺ㄨ崘鐨勶紝鍥犱负绗竴涓 if 鐨勬嫭鍙烽噷闈㈢殑鎰忔濇槸锛氬厛杩愮畻 a > 0 锛屽啀杩愮畻 b > 0 锛屾渶鍚庡彇 b > 0 鐨勫硷紙鐪熸垨鍋囷紝鍗抽潪0鎴0锛変綔涓 if 鐨勫垽鏂潯浠躲傞楀彿涔熸槸 C 璇█涓殑杩愮畻绗︼紝鍦 C 璇█涓紝澶氫釜琛ㄨ揪寮忓彲浠ョ敤閫楀彿鍒嗗紑锛屽叾涓敤閫楀彿鍒嗗紑鐨勮〃杈惧紡鐨勫煎垎鍒绠楋紝浣嗘暣涓...
绛旓細c璇█涓if鍑芥暟鍚庨潰鐨勫皬鎷彿鍐呭彲浠ュ啓2涓垽鏂潯浠讹細if(a==b||b==c)锛沬f(a==d&&b==c)锛沬f鍒ゆ柇璇彞鐨勪綔鐢細灏辨槸褰撴弧瓒充竴瀹氭潯浠舵椂鎵嶄細鎵ц閭ｅ潡浠ｇ爜锛屽惁鍒欏氨涓嶆墽琛岄偅鍧椾唬鐮侊紝浠ｇ爜鐨勭缉杩涗负涓涓猼ab閿紝鎴栬4涓┖鏍笺
绛旓細include <stdio.h>int main(){int a,b,c,t;scanf("%d%d%d",&a,&b,&c); if(a>b)//鍓嶅垽鏂璦鍜宐鐨勫ぇ灏 {t=b;b=a;a=t;} if(b>c)//鍐嶅垽鏂璪鍜c鐨澶у皬 {t=b;b=c;c=t;} if(a>b)//鏈鍚庡垽鏂璦鍜宐鐨勫ぇ灏 {t=a;a=b;b=t;} printf("%d<%d<%d"...
绛旓細if鍑芥暟锛岃鐨勬槸鍋囧锛岀劧鍚庯細鍒嗕袱绉嶏細if鈥︹rintf锛沬f鈥︹lse 绗竴绉嶏細if鈥︹rintf锛屽亣濡備竴绉嶆儏鍐碉紝鐩存帴杈撳嚭缁撴灉銆俰f鈥︹lse锛屾槸鍋囧涓绉嶆儏鍐碉紝涓嶅彂鐢熻繖绉嶆儏鍐佃鎬庢牱杩愯锛歩f()璇彞1 else 璇彞2 杩欐牱鏄崟涓鍙ワ紝鏃f鍜宔lse鍚勬帶鍒朵竴涓鍙 鍐嶆湁涓鍙ユ槸澶嶅悎璇彞 if锛堬級璇彞1 else { 璇彞2 ...
绛旓細if鏄鏋滅殑鎰忔濓紝姣斿璇磋揪鍒拌繖涓潯浠 绀轰緥 if锛坸==0锛墈 鎵ц杩欎釜浠ｇ爜 }
