C语言经典例题.pdf

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C100

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main()
(
inti,j,k;
printf;
for(i=l;i<5;i++)/*UVW#XY*/
for(j=l;j<5;j++)
for(k=l;k<5;k++)
(
if(i!=k&&i!=j&&j!=k)/*\]i
j>k#$*/
printf(z%d,%d,%d\n”,i,j,k);
})

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2.<=
Sinclude"math,h”
mainO
(
longinti,x,y,z;
for(i=l;i<100000;i++)
{x=sqrt(i+100);/*xWhi1004zm4"}|*/
y=sqrt(i+268);/*yW5hi1684zm4"}|*/
if(x*x==i+100&&y*y==i+268)/*{|e"lm"lm‘s,’“”•'
jklm*/
printf("\n%ld'n”,i);
}}
—4˜

™š›œ››žvw’eŸ'’eœ" ¡Ÿ%
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main():.
intday,month,year,sum,leap;
printf(z\npleaseinputyear,month,day\n^);
scanf(¶%d,%d,%dz,&year,ftmonth,&day);
switch(month)/*x¸¹›U¤¯"ºŸ*/
{case1:sum=0;break;
case2:sum=31;break;
case3:sum=59;break;
case4:sum=90;break;
case5:sum=120;break;
case6:sum=151;break;
case7:sum=181;break;
case8:sum=212;break;
case9:sum=243;break;
case10:sum=273;break;
case11:sum=304;break;
case12:sum=334;break;
default:printf(zdataerror^);break;}
sum=sum+day;/*5hi›Ÿ"Ÿ*/
if(year%400=0H(year%4=0&&year%100!=0))/*vw''Àœ*/
leap=1;
else
leap=0;
if(leap=l&&monlh>2)/*{|'Àœ¯°‘2,ºŸ¢shÁŸ*/
sum++;
printf(Z/Itisthe%dthday.¶sum);}
—5˜

™š#fx,y,z,q£’#ÄÅÆ°™Ç0
1.)*ÈÉÊËÌ£ÍÅ"ÎÆxixyxÏyÐÑÒÓ{|x>yÔyxÏy
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2.<=
main()
(
intx,y,z,t;
scanf("%d%d%d”,&x,&y,&z);
if(x>y)
{t=x;x=y;y=t;}/*Ö×x,y"Õ*/
if(x>z)
<Û2Ü2MÜ*Û1ÜÜ}/*Ö×X,Z"Õ*/
if(y>z)
{t=y;y=2*=1;}/*Ö×z,y"Õ*/:.
printf("smalltobig:%d%d%d\n”,x,y,z);}
—6˜

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1.)*+xØ'*'ß-ãiäÇàC,5)љÇ0
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#include¶¶
main()
{printf(^HelloC-world!\nz);
printf(¶****\n¶)Ü
printfC*\n¶)Ü
printf(¶*\n¶)Ü
printf(¶****\n¶);}
—7˜

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1.)*ìí2560ìáîeÙ0
2.<=
#includeҦ
mainO
{chara=176,b=219;
printf(z,%c%c%c%c%c\nz,b,a,a,a,b);
printf(
c%c%c%c%c\n
,a,b,a,b,a);
printfCz%c%c%c%c%c\nz,a,a,b,a,a);
printf(z%c%c%c%c%c\nz/,a,b,a,b,a);
printf(
c%c%c%c%c\n
,b,a,a,a,b);)
—8˜

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1.)*)ÑÏ3³´í9Ñ9òI),ióôÑjóô30
2.<=
#include¶¶
mainO
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inti,j,result;
printf(¶\rT);
for(i=l;i<10;i++)
{for(j=l;j<10;j++)
(
resultÛi*j;
printf(“öi*%d=%-3d¶i,j,result);/*-3d÷øùúûü3$*/
}
printf(¶\n¶)Ü/*ýeÑ4×Ñ*/
}:.
}
—9˜

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iji+j
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^include""
main()
{inti,j;
for(i=0;i<8;i++)
(
for(j=0;j<8;j++)
if((i+j)%2==0)
printf("%c%c”,219,219);
else
printf(z/;
printf("\n");}}
K10]
MNOPQRSTUQRV!OPWXYZ
1.
ijji
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2.'()
ttinclude""
main()
{inti,j;
printf("\l\l\n");/*
WXYZ*/
for(i=l;i<ll;i++)
{for(j=l;j<=i;j++)
printf("]]”219,219);
printf("\n");
})
K11]
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ghi3XklmXkngbcdeodepqir
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2.'()
main()
{longfl,f2;
inti;
fl=f2=l;
for(i=l;i<=20;i++)
{printf("%121d%121dz/,fl,f2);
if(2==0)printf("\n");/*
m‚X*/:.
fl=fl+f2;/*ƒWXk„l…†‡irXk*/
f2=fl+f2;/*ƒWXk„l…†‡irXk*/
}}
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1.
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#include"math,h”
main()
{intm,i,k,h=0,leap=l;
printf("\n");
for(m=101;m<=200;m++)
{k=sqrt(m+1);
for(i=2;i¡=k;i++)
if(m%i==0)
{leap=0;break;}
if(leap){printf("%-4d”,m);h++;
if(h%10==0)
printf("\n");}
leap=l;}
printf(z\nThetotalis%d”,h);
K13]
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for(n=100;n<1000;n++)
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i=n/100;/*
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j=n/10%10;/*
»
¼«*/
k=n%10;/*
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if(i*100+j*10+k==i*i*i+j*j*j+k*k*k)
{printf("%-5d”,n);}
}
printf("\n");}:.
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main()
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printf("\npleaseinputanumber:\n?);
scanf&n);
printf(èd=én);
for(i=2;i<=n;i++)
(
while(n!=i)
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if(n%i==O)
{printf("%d*”,i);
n-n/i;}
else
break;
)
)
printf(ìd”,n);}
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chargrade;
printf("pleaseinputascore'n");
scanfftscore);
grade=score>=90?"A':(score>=60?"B':'C');
printf(z/%dbelongsto%c/z,score,grade);
K16]
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1.

2.
main()
{inta,b,numl,num2,temp;
printf(*zpleaseinputtwonumbers:\n1)2
scanf(14d,%d”,&numl,&num2);
if(numl{temp=numl;
nunil=num2;
num2=temp;
)
a=numl;b=num2;
while(b!=0)/*,=>b?0?@*/
{temp=a%b;
a=b;
b=temp;}
printf(z*gongyueshu:%d\n*/,a);
printfCzgongbeishu:%d\n/z,numl*num2/a);}
F17]
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2.
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mainO
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intletters33*space=0,digit=O,others=0;
printf("pleaseinputsomecharacters'/');
while((c=getchar())!=,\n)
{
if(c>=*a*&&c<=,z||c>='A'&&c<=*Z')
letters++;
elseif(c==,')
space++;
elseif(c>='O'&&c<p'9')
digit++;
else
others++;
)
printf(*zallinall:char=%dspace=%ddigitp%dothers=%d\n*z,letters,
space,digit,others);
F18]
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main()
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longintsn=0,tn=0;
printfC'pleaseinputaandn\n1)2
scanf(14d,%d1*&a,&n);
printf(1a=%d,n=%d\n1,a,n);
while(count<=n)
{tn=tn+a;
sn=sn+tn;
a=a*10;
++count;
}
printf("a+aa+‰=%ld\n”,sn);
F19]
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main()
{staticintk[10];
inti,j,n,s;
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{n=-l;
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for(i=l;i
(
if((j%i)==O)
{n++
s=s-i;
k[n]=i;
)
)
if(s==0)
{printf(*z%disawanshu”,j);
for(i=0;iprintf("%d,",k[i]);
printf(14d\n1,k[n]);}}}
F20]:.
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main()
{floatsn=,hn=sn/2;
intn;
for(n=2;n<=10;n++)
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sn=sn+2*hn;/*¼n²°³z{½¾^«*/
hn=hn/2;/*¼n²µ¶¬­*/}
printf("thetotalofroadis%f\n”,sn);
printf("thetenthis%fmeter'n”,hn);}
F21]
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main()
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day=9;
x2=l;
while(day>0)
{xl=(x2+l)*2;/*¼MË^ɑu¼2Ëɑ1´^2*/
x2=xl;
dayM;}
printf(z/thetotalis%d\n',xl);}
F22]
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main()
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for(i=x,;i<=z';i++)
for(j-x';j<='z';j++)
(
if(i!=j)
for(k=x,;k<=z';k++)
{if(i!=k&&j!=k):.
{if(i!='x'&&k!='x'&&k!X'z')
printf("orderisa-%c\tb%%c\tc%%c\n_i,j,k);
}}})
a
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printf(z_)‡
for(k=0;k<=2*i;k++)
printf("*");
printf(_\n_)‡}
for(i=0;i<=2;i++)
{for(j=0;j<=i;j++)
printf(?_)‡
for(k=0;k<=4-2*i;k++)
printf(_*");
printf(_\n_)‡}}
a
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2.
?***@A
mainO
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1=a‡@™+1)‡15=1‡/*1q<
š›
œžžtŸ$*/}
printf(z/sumis%\n",s);}:.
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25]
de1+2!+3!+.,+20!
1.
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?***@A
main()
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for(n=l;n<=20;n++)
{t*=n;
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printf(z/l+2!+3!...+20!=%c\n”,s);}
a
26]
de{$¨©"#5!
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2.
?***@A
©include-"
main()
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intfact();
for(i=0;i<5;i++)
printf("\40:%d!=%d\n_i,fact(i));}
intfact(j)
intj;
{intsum;
if(j==0)
sum=l;
else
sum=j*fact(j-1);
returnsum;}
a
27]
de{$¨©°!±$"«²³´µ5&¶·¸¹=º
fgr
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2.
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#
main()
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printf(_\40:_);
palin(i);
printf(_\n_)‡}
voidpalin(n)
intn;
{charnext;:.
if(n<=l)
{next=getchar();
printfC\n\O<);
putchar(next);}
else
{next=getchar();
palin(n-l);
putchar(next);}}
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age(n)
intn;
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if(n==l)c=10;
elsec=age(n-l)+2;
return©;}
main()
{printf(z/%dz/,age(5));}
a
29]
deÛ%&
ÅÜ5ÝÞ7!э%ߍà<áÝ!Xßâ
fgãÝ!¶
1.
äåæçèÝ!3hæé(1ê<%ëìí#îï!002ðñ
òóô)
2.
?***@A
main()
{longa,b,c,d,e,x;
scanf&x);
a=x/l0000;/*æõÝ*/
b=x%10000/1000;/*æöÝ*/
c=x%1000/100;/*æ÷Ý*/
d=x%100/10;/*æøÝ*/
e=x%10;/*æ&Ý*/
if(a!=0)printf(zthereare5,%ld%ld%ld%ld%ld\nz,e,d,c,b,a);
elseif(b!=0)printf("thereare4,%ld%ld%ld%ld\nz,e,d,c,b);
elseif(c!=0)printfCthereare3,%ld%ld%ld\ne,d,c);
,
elseif(d!=0)printf("thereare2,%ld%ld\nz,e,d);
elseif(e!=0)printf(zthereare1,%ld\nz,e);}:.
a
30]
deè&5Ý!à<
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?***@A
main()
{longge,shi,qian,wan,x;
scanf&x);
wan=x/10000;
qian=x%10000/1000;
shi=x%100/10;
ge=x%10;
if(ge=wan&&shi=qian)/*&ÝþÜõÝÿ
*/
printf(zthisnumberisahuiwen\n)
else
printf("thisnumberisnotahuiwen\nz);}
#$31'
()*+,-./01234567893:;./0<=23456>?***@AB
892C456D
1.#$FG*HIJKLMNO<=234563?***@89HIJKLPifKL89
2C456D
2.#$RST*
#include<>
voidmain()
{charletter;
printf(/pleaseinputthefirstletterofsomeday\n/);
while((letter=getch())!='Y')/*bcd56eYfghi*/
{switch(letter)
{case'S':printf("pleaseinputsecondletter\n/);
if((letter=getch0)==,a)
printf("Saturday\n)
elseif((letter=getch())==u)
printf("sunday\n);
elseprintf(zdataerror\n)break;
case'F':printf(zfriday\nz/);break;
case'M':printf(monday\nz);break;
caseJT):printf(''pleaseinputsecondletter\n)
if((letter=getch())==u')
printf(/tuesday\n/);
elseif((letter=getch())=='h')
printf(z'thursday\nz);
elseprintf(z/dataerror\n)
break;
case'W':printf("Wednesday\n");break;:.
default:printf("dataerror\n)
}}}
t#$32]
()*Pressanykeytochangecolor,!
1.#$FG*
2.#$RST*
#include<>
voidmain(void)
{intcolor;
for(color=0;color<8;color++)
{textbackground(color);/*z{|}1~€*/
cprintf("Thisiscolor%d\r\nz,color);
cprintf(zPressanykeytocontinue\r\nz);
getch();/*,-5ƒ„…†*/}
)
t#$33]
()*‡ˆgotoxy()‰clrscr()Š‹
1.#$FG*
2.#$RST*
#include<>
voidmain(void)
{clrscr();/*ŒŠ‹*/
textbackground(2);
gotoxy(1,5);/*Š‹*/
cprintf(z/Outputatrow5columnl\n)
textbackground(3);
gotoxy(20,10);
cprintf(''Outputatrow10column20\n)
}
t#$34]
()*’ˆŠ‹“H
1.#$FG*
2.#$RST*
#include<>
voidhello_world(void)
{printf(''Hello,world!\n)}
voidthree_hellos(voi