全国计算机二级C机试题库

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♦include<conio.h>

#include<stdio.h>

♦include<string.h>

#include<stdlib.h>

floatfun(intn)

)

voidmain()

(

FILE*wf;

intn;

floats;

system(nCLSH);

printf("\nPleaseenterN:");

scanf("%d"，&n);

s=fun(n);

printf("Theresultis:%f\n”，s);

/**********★**************★★★**/

wf=fopen("out.dat",Hwn);

fprintf(wf,"％f”，fun(11));

fclose(wf);

/*****************************/

)

飞。，比

floatfun(intn)

(

intizsl=0;

floats=0.0;

for(i=l;i<=n;i++)

(

sl=sl+i;

s=s+l.0/sl;

)

returns;

)

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E6ia3tDd:

#include<conio.h>

#include<stdio.h>

ttinclude<stdlib.h>

voidfun(char*ttzintpp[])

(

)

voidmain()

(

FILE*wf;

charaa[1000];

intbb[26],k;

system("CLSH);

printf("\nPleaseenteracharstring:");

scanf("%s"，aa);

fun(aa,bb);

for(k=0;k<26;k++)

printf(H%d”，bb[k]);

printf(n\n");

/★********★*★**************★★**/

wf=fopen("out.datn,nwn);

fun("abcdefgabcdeabc”，bb);

for(k=0;k<26;k++)

nH

fprintf(wfz%d,bb[k]);

fclose(wf);

/*********★★******************/

)

，ij

voidfun(char*ttzintpp[])

inti;

for(i=0;i<26;i++)

pp[i]=0;

for(;*tt!=*\01;tt++)

ifa'*z1)

pp[*tt-,a,]++;

)

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EOia3IDd:

#include<conio.h>

#include<stdio.h>

#include<stdlib.h>

#defineM81

intfun(char*ss,charc)

(

)

voidmain()

(

FILE*wf;

chara[M],ch;

system(“CLS“);

printf(n\nPleaseenterastring:");

gets(a);

printf("XnPleaseenterachar:H);

ch=getchar();

printf(n\nThenumberofthecharis:%d\n”，fun(arch));

/★*★*****★★★**************★****/

wf=fopen(Hout.dat",HwH);

fprintf(wf,n%dn,fun(“123412132"，'1'));

fclose(wf);

/*********★★★************★★★★*/

)

[犷九/飞。，

intfun(char*ss,charc)

inti=0;

for(;*ss!=*\01;ss++)

if(*ss==c)

i++；

returni;

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E6ia3IDd:

#include<conio.h>

#include<stdio.h>

#include<stdlib.h>

#defineM100

voidfun(intm,int*a,int*n)

(

}

voidmain()

(

FILE*wf;

intaa[M],n,k;

system(nCLSn);

fun(50,aa,&n);

for(k=0;k<n;k++)

3

if((k+1)%20==0)/*AeDDEab20AoEy*/

H

{printf(%4d"zaa[k]);

printf(H\nn);

)

else

H

printf(%4d"zaa[k]);

printf("\nH);

/**********★*******************/

wf=fopen("out.datn,HwH);

for(k=0;k<n;k++)

fprintf(wf,n%4dH,aa[k]);

fclose(wf);

/*****************************/

)

[切飞。，i±

voidfun(intm,int*a,int*n)

(

intizj=0;

for(i=l;i<=m;i++)

if(i%7==0||i%ll==0)

a[j++]=i;

*n=j;

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EOIa3IDd:

#include<stdio.h>

#include<conio.h>

voidfun(inta,intbzlong*c)

(

)

voidmain()

(

inta,b;

longc;

FILE*out;

printf("Inputa,b:H);

scanf("%d%d”，&a,&b);

fun(a,b,&c);

printf("Theresultis:%ld\n'\c);

/女★★★★★★***★★★★****★★★★****★★★★/

nHn

out=fopen("out.datfw);

fun(a+11,b+22,&c);

n

fprintf(out,%ld\n"fc);

fclose(out);

}

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voidfun(inta,intb,long*c)

{

*c=(a%10)*1000+(b%10)*100+(a/10)*10+b/10;

)

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EOIa3tDd:

♦include<conio・h>

♦include<stdio.h>

#include<math.h>

♦include<stdlib.h>

doublefun(intm)

)

voidmain()

(

FILE*wf;

system(”CLS“);

printf(n%f\nfun(20));

/1A1*****************************/

wf=fopen("out.dat",HwH);

nn

fprintf(wf,%fzfun(20));

fclose(wf);

/*****************************/

)

doublefun(intm)

(

inti;

doubles=0.0;

for(i=l;i<=m;i++)

s=s+log(i);

returnsqrt(s);

)

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EOia3IDd:

#include<conio.h>

♦include<math.h>

♦include<stdio.h>

#include<stdlib.h>

doublefun(intn)

voidmain()

(

FILE*wf;

system(nCLSH);

printf(Hs=%f\nn,fun(1000));

/******************************y

wf=fopen("out.dat“，"w");

fprintf(wf,n%fM,fun(1000));

fclose(wf);

/文*★*******★*****★*********★★★/

)

Wf-"

doublefun(intn)

{doubles=0.0;

inti;

for(i=0;i<n;i++)

if(i%5==0&&i%ll==0)

s=s+i；

s=sqrt(s);

returns;

)

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EOIa3IDd:

#include<conio.h>

#include<stdio.h>

#include<stdlib.h>

voidfun(intm,int*k,intxx[])

(

)

voidmain()

(

FILE*wf;

intm,n,zz[100];

system(HCLSH);

printf(M\nPleaseenteranintegernumberbetween10and100:H);

scanf(n%dn,&n);

fun(n,&m,zz);

printf("\n\nThereare%dnon-primenumberslessthan%d:"，m,n);

for(n=0;n<m;n++)

HH

printf(\n%4dfzz[n]);

/******************************y

wf=fopen("out.dat",HwH);

fun(17,&m,zz);

for(n=0;n<m;n++)

fprintf(wf,"％4d”，zz[n]);

fclose(wf);

/★★*******★★★************★***文/

)

voidfun(intm,int*k,intxx[])

(

inti,j,n=0;

for(i=4;i<m;i++)

{for(j=2;j<i;j++)

if(i%j==0)break;

if(j<i)xx[n++]=i;

)

*k=n;

)

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E6±a3IDd:

♦include<conio.h>

#include<stdio.h>

♦include<stdlib.h>

floatfun(intm,intn)

(

)

voidmain()

(

FILE*wf;

system(nCLSn);

Hn

printf(p=%f\nzfun(12,8));

/******************************/

wf=fopen("out.dat",HwH);

fprintf(wf,H%f",fun(12,8));

fclose(wf);

/★★★★*****★★★****★★★*****★★★★文/

)

i%2露才0。，比

floatfun(intm,intn)

(

inti;

doublep=l.0;

for(i=l;i<=m;i++)

p=p*i；

for(i=l;i<=n;i++)

p=p/i；

for(i=l;i++)

p=p/i；

returnp;

)

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EOia3IDd:

#include<stdio.h>

♦include<conio.h>

#include<stdlib.h>

floatfun(floath)

(

)

voidmain()

(

FILE*wf;

floata;

system(HCLSH);

printf("Entera:n);

scanf("V,&a);

printf("Theoriginaldatais:H);

printf(n%f\n\nH,a);

printf("Theresult:%f\n"，fun(a));

/**********★*******************/

wf=fopen("out.dat",nwH);

fprintf(wf,”，fun(8.32533));

fclose(wf);

/**★**************************/

}

i%214力。/士

floatfun(floath)

(

longt;

t=(h*10004-5)/10;

return(float)t/100;

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EOia3IDd:

#include<conio.h>

#include<stdio.h>

#include<stdlib.h>

#defineM4

#defineN5

intfun(inta[M][N])

(

)

voidmain()

(

FILE*wf;

intaa[M][N]={{1,3,5,7,9},{2,9,9,9,4},{6,9,9,9,8},{l,3,5,7,0}};

inti,j,y;

system(nCLSH);

printf("Theoriginaldatais:\nn);

for(i=0;i<M;i++)

{for(j=0;j<N;j++)

printf("%6dn,aa[i][j]);

printf(H\nn);

)

y=fun(aa);

printf(n\nThesun:%d\n”，y);

printf(H\nH);

/******************************/

wf=fopen("out.dat",HwH);

fprintf(wf,"％d”，y);

fclose(wf);

/*****************************/

)

intfun(inta[M][N])

(

inti,j,sum=0;

for(i=0;i<M;i++)

for(j=0;j<N;j++)

if(i==0||i==M-l||j==0||j==N-l)

sum=sum+a[i][j];

returnsum;

)

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EOIa3if)d:

#include<stdio.h>

#include<conio.h>

♦include<math.h>

floatfun()

(

)

main()

(

FILE*out;

floatf=fun();

Mn

printf(Root=%f\nzf);

/******************************/

out=fopen(nout.dat",nw");

fprintf(out,”％f”,f);

fclose(out);

/*****************************★I

)

floatfun()

(

floatxl=0.0,xO;

do

x0=xl;

xl=cos(xO);

}while(fabs(xO-xl)>=le-6);

returnxl;

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E6ia3IDd:

ttinclude<stdio.h>

#include<conio.h>

voidfun(char*a)

(

)

voidmain()

(

FILE*wf;

nn

chars[81]zt[81]=****A*BC*DEF*G*******;

printf("Enterastring:\nH);

gets(s);

fun(s);

printf("Thestringafterdeleted:\nn);puts(s);

/1A1*****************************/

wf=fopen("out.dat",HwH);

fun(t);

fprintf(wf,H%sn,t);

fclose(wf);

/*****************************/

)

voidfun(char*a)

(

char*p=a;

while(*p==1*1)

P++；

for(;*p!=1\01;p++,a++)

*a=*p;

*a=,\0,;

)

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EOia3iDd:

♦include<stdio.h>

#defineN80

intfun(char*str)

(

)

main()

(

chars[N];

FILE*out;

char*test[]={”1234321“，“123421“，”123321”，“abcdCBA"};

inti;

printf("Enterastring:");

gets(s);

printf("\n\nH);

puts(s);

if(fun(s))

printf(HYES\nn);

else

printf(HN0\nn);

/★★★★★*****★★★*****★★★****★★★★****★★★/

out=fopen(nout.daf\HwH);

for(i=0;i<4;i++)

if(fun(test[i]))

fprintf(out,nYES\nn);

else

fprintf(out,nNO\nn);

fclose(out);

/************************************/

)

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intfun(char*str)

inti,n=0,fg=l;

char*p=str;

while(*p)

{

n++;

P++；

)

for(i=0;i<n/2;i++)

if(str[i]==str[n-l-i]);

else

(

fg=0；

break;

)

returnfg;

)

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EOia3iDd:

#include<string.h>

#include<conio.h>

#include<stdio.h>

#defineN81

voidfun(char*s)

(

)

main()

(

chara[N];

FILE*out;

printf(nEnterastring:;

gets(a);

printf("Theoriginalstringis:H);

puts(a);

fun(a);

printf("\nn);

printf(HThestringaftermodified:H);

puts(a);

H

strcpy(az"HelloWorld!);

fun(a);

out=fopen("out・dat“，“w");

H

fprintf(out,%s"za);

fclose(out);

/★★★★★****★★★*****★★★★★★****★★*I

)

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voidfun(char*s)

(

charch;

int

i=0;

m=n=strlen(s)-1;

while(i<(n+l)/2)

(

ch=s[i];

s[i]=s[m];

s[m]=ch;

i++；

m——;

}

)

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#include<stdio.h>

#include<string.h>

longfun(char*p)

(

)

voidmain()

(

FILE*wf;

chars[6];

longn;

printf("Enterastring:\n");

gets(s);

n=fun(s);

nH

printf(%ld\nrn);

/★★★★★★★★★★★★★***★*★**★*★★★****/

wf=fopen("out.dat"，"w");

fprintf(wf,fun(”-1234”));

fclose(wf);

/★★★★****★★★★*★*★*★★★*****★★★★I

}

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longfun(char*p)

(

longn=0;

intflag=l;

if(*p==,-1)

{p++;flag=-1;}

elseif(*p==1+1)

P++；

while(*p!=*\01

{n=n*10+*p-101;

P++；

}

returnn*flag;

)

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EOIa3IDd:

#include<conio.h>

♦include<stdio.h>

♦include<string.h>

voidfun(char*ss)

)

voidmain()

chartt[51];

FILE*out;

printf("Pleaseenterancharacterstringwithin50characters:\nn);

gets(tt);

Hn

printf(\n\nAfterchanging,thestring\n%sztt);

fun(tt);

printf(n\nbecomes\n%sn,tt);

/★★★★****★★★★*★*★*★★★*****★★★**/

out=fopen(Hout.datH,nw");

strcpy(tt,"Afterchangingthestring**);

fun(tt);

Hn

fprintf(out,%sztt);

fclose(out);

/★★★★****★★★★****★★★★****★★★★★★/

)

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voidfun(char*ss)

(

inti,n=0;

char*p=ss;

while(*p)

(

n++;

p++；

)

for(i=0;i<n;i++)

if((ss[i]>=,a,&&ss[i]<=,z,)&&i%2!=0)

ss[i]=ss[i]-32;

ss[i]=1\01;

)

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EOia3iDd:

♦include<conio.h>

#include<stdio.h>

#include<string.h>

ttinclude<stdlib.h>

intfun(char*str,char*substr)

{

}

voidmain()

(

FILE*wf;

charstr[81],substr[3];

intn;

system(nCLSH);

printf(nEaEeO^xO-uz<§>:n);

gets(str);

printf("EaEex6xO-uz®:");

gets(substr);

puts(str);

puts(substr);

n=fun(str,substr);

,,n

printf(n=%d\nzn);

/★★★★****★★★★*★*★*★★★******★★★*/

wf=fopen("out.dat",HwH);

n=ftin(nasdasasdfgasdaszx67asdmklon,"asH);

HH

fprintf(wf,%dzn);

fclose(wf);

/*****************************/

)

intfun(char★str,char*substr)

(

intizj=0;

for(i=0;str[i+1]!=*\01;i++)

if(str[i]==substr[0]&&str[i+1]==substr[1])

j++；

returnj;

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EOta3IDd:

#include<conio.h>

#include<stdio.h>

#include<string.h>

#include<stdlib.h>

char*fun(char(*a)[81],intnum,char*max)

(

)

voidmain()

(

FILE*wf;

charss[10][81],*ps=NULL;

chars[3][81]={”abcd“，“deg“，"diegns”},*p=NULL;

inti=0,n;

system(nCLSH);

printf(nEaEeE6,E,dxQ-uz®£on);

gets(ss[i]);

puts(ss[i]);

while(!strcmp(ss[i],H****")==0)/*6A4,dD(；oAx4-ia^aE0EaEepA±eO^*/

(

i++；

gets(ss[i]);

puts(ss[i]);

}

n=i;

ps=fun(ss,n,ps);

printf(”\nmax=%s\n"，ps);

/**********★**************★★★**/

wf=fopen("out.dat",Hwn);

p=fun(s,3,p);

nn

fprintf(wf,%szp);

fclose(wf);

/**************************★**/

)

i%2曳力力。，工

char*fun(char(*a)[81],intnum,char*max)

(

inti=0;

max=a[0];

for(i=0;i<num;i++)

if(strlen(max)<strlen(a[i]))

max=a[i];

returnmax;

)

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z

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FirstString

SecondString

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FirstStringSecondString

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EOia3IDd:

#include<stdio.h>

#include<conio.h>

#include<stdlib.h>

voidfun(charpl[],charp2[])

(

)

voidmain()

(

FILE*wf;

charsi[80],s2[40];

charpl[80]=nFirstStringn,p2[40]=nSecondstringH;

system("CLSH);

printf(nEntersiands2:\nn);

scanf("%s%s"，si,s2);

printf(nsl=%s\nn,si);

printf("s2=%s\n"，s2);

printf("Invokefun(sl,s2):\n");

fun(si,s2);

printf("Afterinvoking:\n");

nn

printf(%s\nzsl);

I★★★