C語言基礎(chǔ)知識集錦

本文格式為Word版，下載可任意編輯——C語言基礎(chǔ)知識集錦C語言根基學(xué)識集錦

懂編程語言，有寫一些工程的`閱歷，能夠看懂一些對比繁雜工程的代碼對我們是特別有扶助的，下面我為大家整理了一些C語言根基學(xué)識，一起來看看吧：

1、C語言檢查是元音還是輔音

#include

intmain

charc;

printfEnteranalphabet:;

scanf%c,c;

ifc==a||c==A||c==e||c==E||c==i||c==I||c==o||c==O||c==u||c==U

printf%cisavowel.,c;

else

printf%cisaconsonant.,c;

return0;

輸出1：

Enteranalphabet:i

iisavowel.

輸出2：

Enteranalphabet:G

Gisaconsonant.

也可以用條件運(yùn)算符解決

/*Cprogramtocheckwhetheracharacterisvowelorconsonantusingconditionaloperator*/

#include

intmain

charc;

printfEnteranalphabet:;

scanf%c,c;

c==a||c==A||c==e||c==E||c==i||c==I||c==o||c==O||c==u||c==U?printf%cisavowel.,c:printf%cisaconsonant.,c;

return0;

輸出結(jié)果和上面的程序一致。

2、C語言實(shí)現(xiàn)從三個數(shù)值中查找最大值

實(shí)現(xiàn)1：

/*Cprogramtofindlargestnumberusingifstatementonly*/

#include

intmain

floata,b,c;

printfEnterthreenumbers:;

scanf%f%f%f,a,b,c;

ifa=ba=c

printfLargestnumber=%.2f,a;

ifb=ab=c

printfLargestnumber=%.2f,b;

ifc=ac=b

printfLargestnumber=%.2f,c;

return0;

實(shí)現(xiàn)2：

/*Cprogramtofindlargestnumberusingif...elsestatement*/

#include

intmain

floata,b,c;

printfEnterthreenumbers:;

scanf%f%f%f,a,b,c;

ifa=b

ifa=c

printfLargestnumber=%.2f,a;

else

printfLargestnumber=%.2f,c;

else

ifb=c

printfLargestnumber=%.2f,b;

else

printfLargestnumber=%.2f,c;

return0;

實(shí)現(xiàn)3：

/*CProgramtofindlargestnumberusingnestedif...elsestatement*/

#include

intmain

floata,b,c;

printfEnterthreenumbers:;

scanf%f%f%f,a,b,c;

ifa=ba=c

printfLargestnumber=%.2f,a;

elseifb=ab=c

printfLargestnumber=%.2f,b;

else

printfLargestnumber=%.2f,c;

return0;

輸出結(jié)果一致：

Enterthreenumbers:12.2

13.452

10.193

Largestnumber=13.45

3、C語言解一元二次方程

/*Programtofindrootsofaquadraticequationwhencoefficientsareenteredbyuser.*/

/*Libraryfunctionsqrtcomputesthesquareroot.*/

#include

#include/*Thisisneededtousesqrtfunction.*/

intmain

floata,b,c,determinant,r1,r2,real,imag;

printfEntercoefficientsa,bandc:;

scanf%f%f%f,a,b,c;

determinant=b*b-4*a*c;

ifdeterminant0

r1=-b+sqrtdeterminant/2*a;

r2=-b-sqrtdeterminant/2*a;

printfRootsare:%.2fand%.2f,r1,r2;

elseifdeterminant==0

r1=r2=-b/2*a;

printfRootsare:%.2fand%.2f,r1,r2;

else

real=-b/2*a;

imag=sqrt-determinant/2*a;

printfRootsare:%.2f+%.2fiand%.2f-%.2fi,real,imag,real,imag;

return0;

輸出1：

Entercoefficientsa,bandc:2.3

4

5.6

Rootsare:-0.87+1.30iand-0.87-1.30i

輸出2：

Entercoefficientsa,bandc:4

1

0

Rootsare:0.00and-0.25

4、C語言檢查是否是閏年

/*Cprogramtocheckwhetherayearisleapyearornotusingifelsestatement.*/

#include

intmain

intyear;

printfEnterayear:;

scanf%d,year;

ifyear%4==0

ifyear%100==0/*Checkingforacenturyyear*/

ifyear%400==0

printf%disaleapyear.,year;

else

printf%disnotaleapyear.,year;

else

printf%disaleapyear.,year;

else

printf%disnotaleapyear.,year;