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1.Êéд±êʶ·ûʱ£¬ºöÂÔÁË´óСд×ÖĸµÄÇø±ð¡£
main()
{
int a=5;
printf("%d",A);
}
±àÒë³ÌÐò°ÑaºÍAÈÏΪÊÇÁ½¸ö²»Í¬µÄ±äÁ¿Ãû£¬¶øÏÔʾ³ö´íÐÅÏ¢¡£CÈÏΪ´óд×ÖĸºÍСд×ÖĸÊÇÁ½¸ö²»Í¬µÄ×Ö·û¡£Ï°¹ßÉÏ£¬·ûºÅ³£Á¿ÃûÓôóд£¬±äÁ¿ÃûÓÃСд±íʾ£¬ÒÔÔö¼Ó¿É¶ÁÐÔ¡£

2.ºöÂÔÁ˱äÁ¿µÄÀàÐÍ£¬½øÐÐÁ˲»ºÏ·¨µÄÔËËã¡£
main()
{
float a,b;
printf("%d",a%b);
}
%ÊÇÇóÓàÔËË㣬µÃµ½a/bµÄÕûÓàÊý¡£ÕûÐͱäÁ¿aºÍb¿ÉÒÔ½øÐÐÇóÓàÔËË㣬¶øÊµÐͱäÁ¿Ôò²»ÔÊÐí½øÐС°ÇóÓࡱÔËËã¡£

3.½«×Ö·û³£Á¿Óë×Ö·û´®³£Á¿»ìÏý¡£
char c;
c="a";
ÔÚÕâÀï¾Í»ìÏýÁË×Ö·û³£Á¿Óë×Ö·û´®³£Á¿£¬×Ö·û³£Á¿ÊÇÓÉÒ»¶Ôµ¥ÒýºÅÀ¨ÆðÀ´µÄµ¥¸ö×Ö·û£¬×Ö·û´®³£Á¿ÊÇÒ»¶ÔË«ÒýºÅÀ¨ÆðÀ´µÄ×Ö·ûÐòÁС£C¹æ¶¨ÒÔ¡°\¡±×÷×Ö·û´®½áÊø±êÖ¾£¬ËüÊÇÓÉϵͳ×Ô¶¯¼ÓÉϵģ¬ËùÒÔ×Ö·û´®¡°a¡±Êµ¼ÊÉϰüº¬Á½¸ö×Ö·û£º¡®a'ºÍ¡®\'£¬¶ø°ÑËü¸³¸øÒ»¸ö×Ö·û±äÁ¿ÊDz»Ðеġ£

4.ºöÂÔÁË¡°=¡±Óë¡°==¡±µÄÇø±ð¡£
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if (a=3) then ¡­
µ«CÓïÑÔÖУ¬¡°=¡±ÊǸ³ÖµÔËËã·û£¬¡°==¡±ÊǹØÏµÔËËã·û¡£È磺
if (a==3) a=b;
ǰÕßÊǽøÐбȽϣ¬aÊÇ·ñºÍ3ÏàµÈ£¬ºóÕß±íʾÈç¹ûaºÍ3ÏàµÈ£¬°ÑbÖµ¸³¸øa¡£ÓÉÓÚϰ¹ßÎÊÌ⣬³õѧÕßÍùÍù»á·¸ÕâÑùµÄ´íÎó¡£

5.Íü¼Ç¼Ó·ÖºÅ¡£
·ÖºÅÊÇCÓï¾äÖв»¿ÉȱÉÙµÄÒ»²¿·Ö£¬Óï¾äĩβ±ØÐëÓзֺš£
a=1
b=2
±àÒëʱ£¬±àÒë³ÌÐòÔÚ¡°a=1¡±ºóÃæÃ»·¢Ïַֺţ¬¾Í°ÑÏÂÒ»ÐС°b=2¡±Ò²×÷ΪÉÏÒ»ÐÐÓï¾äµÄÒ»²¿·Ö£¬Õâ¾Í»á³öÏÖÓï·¨´íÎ󡣸Ĵíʱ£¬ÓÐʱÔÚ±»Ö¸³öÓдíµÄÒ»ÐÐÖÐδ·¢ÏÖ´íÎ󣬾ÍÐèÒª¿´Ò»ÏÂÉÏÒ»ÐÐÊÇ·ñ©µôÁ˷ֺš£
{ z=x+y;
t=z/100;
printf("%f",t);
}
¶ÔÓÚ¸´ºÏÓï¾äÀ´Ëµ£¬×îºóÒ»¸öÓï¾äÖÐ×îºóµÄ·ÖºÅ²»ÄܺöÂÔ²»Ð´(ÕâÊǺÍPASCAL²»Í¬µÄ)¡£

6.¶à¼Ó·ÖºÅ¡£
¶ÔÓÚÒ»¸ö¸´ºÏÓï¾ä£¬È磺
{ z=x+y;
t=z/100;
printf("%f",t);
};
¸´ºÏÓï¾äµÄ»¨À¨ºÅºó²»Ó¦Ôټӷֺţ¬·ñÔò½«»á»­ÉßÌí×ã¡£
ÓÖÈ磺
if (a%3==0);
I++;
±¾ÊÇÈç¹û3Õû³ýa£¬ÔòI¼Ó1¡£µ«ÓÉÓÚif (a%3==0)ºó¶à¼ÓÁ˷ֺţ¬ÔòifÓï¾äµ½´Ë½áÊø£¬³ÌÐò½«Ö´ÐÐI++Óï¾ä£¬²»ÂÛ3ÊÇ·ñÕû³ýa£¬I¶¼½«×Ô¶¯¼Ó1¡£
ÔÙÈ磺
for (I=0;I<5;I++);
{scanf("%d",&x);
printf("%d",x);}
±¾ÒâÊÇÏȺóÊäÈë5¸öÊý£¬Ã¿ÊäÈëÒ»¸öÊýºóÔÙ½«ËüÊä³ö¡£ÓÉÓÚfor()ºó¶à¼ÓÁËÒ»¸ö·ÖºÅ£¬Ê¹Ñ­»·Ìå±äΪ¿ÕÓï¾ä£¬´ËʱֻÄÜÊäÈëÒ»¸öÊý²¢Êä³öËü¡£

7.ÊäÈë±äÁ¿Ê±Íü¼Ç¼ÓµØÖ·ÔËËã·û¡°&¡±¡£
int a,b;
scanf("%d%d",a,b);
ÕâÊDz»ºÏ·¨µÄ¡£Scanfº¯ÊýµÄ×÷ÓÃÊÇ£º°´ÕÕa¡¢bÔÚÄÚ´æµÄµØÖ·½«a¡¢bµÄÖµ´æ½øÈ¥¡£¡°&a¡±Ö¸aÔÚÄÚ´æÖеĵØÖ·¡£

8.ÊäÈëÊý¾ÝµÄ·½Ê½ÓëÒªÇó²»·û¡£
¢Ùscanf("%d%d",&a,&b);
ÊäÈëʱ£¬²»ÄÜÓöººÅ×÷Á½¸öÊý¾Ý¼äµÄ·Ö¸ô·û£¬ÈçÏÂÃæÊäÈë²»ºÏ·¨£º
3£¬4ªæ
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¢Úscanf("%d,%d",&a,&b);
C¹æ¶¨£ºÈç¹ûÔÚ¡°¸ñʽ¿ØÖÆ¡±×Ö·û´®ÖгýÁ˸ñʽ˵Ã÷ÒÔÍ⻹ÓÐÆäËü×Ö·û£¬ÔòÔÚÊäÈëÊý¾ÝʱӦÊäÈëÓëÕâЩ×Ö·ûÏàͬµÄ×Ö·û¡£ÏÂÃæÊäÈëÊǺϷ¨µÄ£º
3£¬4ªæ
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3 4ªæ 3£º4ªæ
ÓÖÈ磺
scanf("a=%d,b=%d",&a,&b);
ÊäÈëÓ¦ÈçÒÔÏÂÐÎʽ£º
a=3,b=4ªæ

9.ÊäÈë×Ö·ûµÄ¸ñʽÓëÒªÇó²»Ò»Ö¡£
ÔÚÓá°%c¡±¸ñʽÊäÈë×Ö·ûʱ£¬¡°¿Õ¸ñ×Ö·û¡±ºÍ¡°×ªÒå×Ö·û¡±¶¼×÷ΪÓÐЧ×Ö·ûÊäÈë¡£
scanf("%c%c%c",&c1,&c2,&c3);
ÈçÊäÈëa b cªæ
×Ö·û¡°a¡±Ë͸øc1£¬×Ö·û¡° ¡±Ë͸øc2£¬×Ö·û¡°b¡±Ë͸øc3£¬ÒòΪ%cÖ»ÒªÇó¶ÁÈëÒ»¸ö×Ö·û£¬ºóÃæ²»ÐèÒªÓÿոñ×÷ΪÁ½¸ö×Ö·ûµÄ¼ä¸ô¡£

10.ÊäÈëÊä³öµÄÊý¾ÝÀàÐÍÓëËùÓøñʽ˵Ã÷·û²»Ò»Ö¡£
ÀýÈ磬aÒѶ¨ÒåΪÕûÐÍ£¬b¶¨ÒåΪʵÐÍ
a=3;b=4.5;
printf("%f%d\n",a,b);
±àÒëʱ²»¸ø³ö³ö´íÐÅÏ¢£¬µ«ÔËÐнá¹û½«ÓëÔ­Òâ²»·û¡£ÕâÖÖ´íÎóÓÈÆäÐèҪעÒâ¡£

11.ÊäÈëÊý¾Ýʱ£¬Æóͼ¹æ¶¨¾«¶È¡£
scanf("%7.2f",&a);
ÕâÑù×öÊDz»ºÏ·¨µÄ£¬ÊäÈëÊý¾Ýʱ²»Äܹ涨¾«¶È¡£

12.switchÓï¾äÖЩдbreakÓï¾ä¡£
ÀýÈ磺¸ù¾Ý¿¼ÊԳɼ¨µÄµÈ¼¶´òÓ¡³ö°Ù·ÖÖÆÊý¶Î¡£
switch(grade)
{ case 'A':printf("85~100\n";
case 'B':printf("70~84\n";
case 'C':printf("60~69\n";
case 'D':printf("<60\n";
default:printf("error\n";
ÓÉÓÚ©дÁËbreakÓï¾ä£¬caseÖ»Æð±êºÅµÄ×÷Ó㬶ø²»ÆðÅжÏ×÷Óá£Òò´Ë£¬µ±gradeֵΪAʱ£¬printfº¯ÊýÔÚÖ´ÐÐÍêµÚÒ»¸öÓï¾äºó½Ó×ÅÖ´Ðеڶþ¡¢Èý¡¢ËÄ¡¢Îå¸öprintfº¯ÊýÓï¾ä¡£Õýȷд·¨Ó¦ÔÚÿ¸ö·ÖÖ§ºóÔÙ¼ÓÉÏ¡°break;¡±¡£ÀýÈç
case 'A':printf("85~100\n";break;

13.ºöÊÓÁËwhileºÍdo-whileÓï¾äÔÚϸ½ÚÉϵÄÇø±ð¡£
(1)main()
{int a=0,I;
scanf("%d",&I);
while(I<=10)
{a=a+I;
I++;
}
printf("%d",a);
}
(2)main()
{int a=0,I;
scanf("%d",&I);
do
{a=a+I;
I++;
}while(I<=10);
printf("%d",a);
}
¿ÉÒÔ¿´µ½£¬µ±ÊäÈëIµÄֵСÓÚ»òµÈÓÚ10ʱ£¬¶þÕߵõ½µÄ½á¹ûÏàͬ¡£¶øµ±I>10ʱ£¬¶þÕß½á¹û¾Í²»Í¬ÁË¡£ÒòΪwhileÑ­»·ÊÇÏÈÅжϺóÖ´ÐУ¬¶ødo-whileÑ­»·ÊÇÏÈÖ´ÐкóÅжϡ£¶ÔÓÚ´óÓÚ10µÄÊýwhileÑ­»·Ò»´ÎÒ²²»Ö´ÐÐÑ­»·Ì壬¶ødo-whileÓï¾äÔòÒªÖ´ÐÐÒ»´ÎÑ­»·Ìå¡£

14.¶¨ÒåÊý×éʱÎóÓñäÁ¿¡£
int n;
scanf("%d",&n);
int a[n];
Êý×éÃûºóÓ÷½À¨ºÅÀ¨ÆðÀ´µÄÊdz£Á¿±í´ïʽ£¬¿ÉÒÔ°üÀ¨³£Á¿ºÍ·ûºÅ³£Á¿¡£¼´C²»ÔÊÐí¶ÔÊý×éµÄ´óС×÷¶¯Ì¬¶¨Òå¡£

15.ÔÚ¶¨ÒåÊý×éʱ£¬½«¶¨ÒåµÄ¡°ÔªËظöÊý¡±ÎóÈÏΪÊÇ¿ÉʹµÄ×î´óϱêÖµ¡£
main()
{static int a[10]={1,2,3,4,5,6,7,8,9,10};
printf("%d",a[10]);
}
CÓïÑԹ涨£º¶¨ÒåʱÓÃa[10]£¬±íʾaÊý×éÓÐ10¸öÔªËØ¡£ÆäϱêÖµÓÉ0¿ªÊ¼£¬ËùÒÔÊý×éÔªËØa[10]ÊDz»´æÔڵġ£

16.³õʼ»¯Êý×éʱ£¬Î´Ê¹Óþ²Ì¬´æ´¢¡£
int a[3]={0,1,2};
ÕâÑù³õʼ»¯Êý×éÊDz»¶ÔµÄ¡£CÓïÑԹ涨ֻÓо²Ì¬´æ´¢(static)Êý×éºÍÍⲿ´æ´¢(exterm)Êý×é²ÅÄܳõʼ»¯¡£Ó¦¸ÄΪ£º
static int a[3]={0,1,2};

17.ÔÚ²»Ó¦¼ÓµØÖ·ÔËËã·û&µÄλÖüÓÁ˵ØÖ·ÔËËã·û¡£
scanf("%s",&str);
CÓïÑÔ±àÒëϵͳ¶ÔÊý×éÃûµÄ´¦ÀíÊÇ£ºÊý×éÃû´ú±í¸ÃÊý×éµÄÆðʼµØÖ·£¬ÇÒscanfº¯ÊýÖеÄÊäÈëÏîÊÇ×Ö·ûÊý×éÃû£¬²»±ØÒªÔÙ¼ÓµØÖ··û&¡£Ó¦¸ÄΪ£º
scanf("%s",str);

18.ͬʱ¶¨ÒåÁËÐβκͺ¯ÊýÖеľֲ¿±äÁ¿¡£
int max(x,y)
int x,y,z;
{z=x>y?x:y;
return(z);
}
ÐβÎÓ¦¸ÃÔÚº¯ÊýÌåÍⶨÒ壬¶ø¾Ö²¿±äÁ¿Ó¦¸ÃÔÚº¯ÊýÌåÄÚ¶¨Òå¡£Ó¦¸ÄΪ£º
int max(x,y)
int x,y;
{int z;
z=x>y?x:y;
return(z);
}

[ Last edited by »ÃÓ°ÎÞºÛ on 2006-10-30 at 08:06 ]
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