山东交通大学 信息科学与电气工程学院 C语言期末考试试题库

1、2010年C语言编程题年萝卜家园Microsoft选取日期2功能：求一分数序列2/1，3/2，5/3，8/5，13/8，21/13的前n项之和。说明：每一分数的分母是前两项的分母之和，每一分数的分子是前两项的分子之和例如：求前20项之和的值为32.660259。-#include stdio.hfloat fun(int n) /*Program*/Int I; Float f1=1,f2=1,f3,s=0; For(i=1;i=n;i+) f3=f1+f2; F1=f2; F2=f3; S=s+f2/f1; ) Return s; /* End */main() float y; y=fun

2、(20); printf(y=%fn,y); yzj();yzj() FILE *IN,*OUT; int iIN,i; float fOUT; IN=fopen(in.dat,r); if(IN=NULL) printf(Please Verify The Currernt Dir.It May Be Changed); OUT=fopen(out.dat,w); if(OUT=NULL) printf(Please Verify The Current Dir. It May Be Changed); for(i=0;i10) z=log(x+3) (x-3) z=sin(x)/(cos(

3、x)+4)-#include #includedouble y(float x) /*Program*/Double z; If(x10) z=exp(x); Else if(x-3) z=logz(x+3); Else z=sin(x)/(cos(x)+4);Return(z); /* End */main() float x; scanf(%f,&x); printf(y=%fn,y(x); yzj(); yzj() FILE *IN,*OUT; int n; float i; double o; IN=fopen(in.dat,r); if(IN=NULL) printf(Read Fi

4、le Error); OUT=fopen(out.dat,w); if(OUT=NULL) printf(Write File Error); for(n=0;n10;n+) fscanf(IN,%f,&i); o=y(i); fprintf(OUT,%ldn,o); fclose(IN); fclose(OUT);4功能：对长度为8个字符的字符串，将8个字符按降序排列。例如：原来的字符串为CEAedcab,排序后输出为edcbaECA。-#include#include#includeint fun(char *s,int num) /*Program*/int i,j;char t;for

5、(i=0;inum;i+)for(j=i+1;jnum;j+)if(sisj)t=si;si=sj;sj=t; /* End */main() char s10; printf(输入8个字符的字符串:); gets(s); fun(s,8); printf(n%s,s); NONO();NONO() int i; char a100; FILE *rf, *wf ; rf = fopen(in.dat, r) ; wf = fopen(out.dat, w) ; for(i=0;i3;i+) fscanf(rf, %s, &a); fun(a,8); fprintf(wf, %s, a); f

6、printf(wf, n); fclose(rf); fclose(wf);5功能：用do-while语句求1100的累计和。-#includelong int fun(int n) /*Program*/int i=1,sum=0;dosum=sum+i;i+;While(i=n);return sum; /* End */void main () int i=100; printf(1100的累加和为：%ldn,fun(i); wwjt();wwjt() FILE *IN,*OUT; int i; int iIN; long int iOUT; IN=fopen(in.dat,r); if

7、(IN=NULL) printf(Please Verify The Currernt Dir.It May Be Changed); OUT=fopen(out.dat,w); if(OUT=NULL) printf(Please Verify The Current Dir. It May Be Changed); for(i=0;i5;i+) fscanf(IN,%d,&iIN); iOUT=fun(iIN); fprintf(OUT,%ldn,iOUT); fclose(IN); fclose(OUT);6功能：实现两个整数的交换。例如：给a和b分别输入：60和65，输入为：a=65

8、b=60-#include#includevoid fun(int *a,int *b) /*Program*/int t;t=*a;*a=*b;*b=t; /* End */ main() int a,b; printf(Enter a,b:); scanf(%d%d,&a,&b); fun(&a,&b); printf(a=%d b=%dn,a,b); yzj();yzj() FILE *IN,*OUT; int a,b,n; IN=fopen(in.dat,r); if(IN=NULL) printf(Read File Error); OUT=fopen(out.dat,w); if(

9、OUT=NULL) printf(Write File Error); for(n=0;n=a&si=A&si=Z)k+;return k; /* End */main() char str=Best wishes for you!; int k; k=fun(str); printf(k=%dn,k); yzj();yzj() FILE *IN,*OUT; char sIN80; int iOUT,i; IN=fopen(21.in,r); if(IN=NULL) printf(Please Verify The Currernt Dir.It May Be Changed); OUT=fo

10、pen(21.out,w); if(OUT=NULL) printf(Please Verify The Current Dir. It May Be Changed); for(i=0;i100) printf(data error!n); exit(0); y=fun(x); if(y) printf(%d YESn,x); else printf(%d NOn,x); yzj();yzj() FILE *IN,*OUT; int n,t; int i5; int o; IN=fopen(in.dat,r); if(IN=NULL) printf(Read File Error); OUT

11、=fopen(out.dat,w); if(OUT=NULL) printf(Write File Error); for(t = 0 ; t 5 ; t+) fscanf(IN, %d, &n) ; o=fun(n); fprintf(OUT, %dn,o ) ; fclose(IN); fclose(OUT);9功能：用辗转相除法求两个整数的最大公约数。-#includeint gcd(int n,int m) /*Program*/int r,t;iIf(nm)t=n;n=m;m=t;r=n%m;while(r!=0)n=m;m=r;r=n%m;retrun (m); /* End */

12、main() int n,m,result; scanf(%d%d,&n,&m); result=gcd(n,m); printf(the gcd is %dn,result); yzj();yzj() FILE *IN,*OUT; int m,n; int i2; int o; IN=fopen(in.dat,r); if(IN=NULL) printf(Read File Error); OUT=fopen(out.dat,w); if(OUT=NULL) printf(Write File Error); for(n=0;n6;n+) for(m=0;m2;m+) fscanf(IN,%

13、d,&im); o=gcd(i0,i1); fprintf(OUT,%dn,o); fclose(IN); fclose(OUT);10功能：计算n门课程的平均值，计算结果作为函数值返回。例如：若有5门课程的成绩是：92，76，69，58，88，则函数的值为76.599998。-#include stdio.hfloat fun(int a,int n) /*Program*/int i;float y=0;for(i=0;in;i+)y+=ai;y=y/n;return y; /* End */main() int a=92,76,69,58,88; printf(y=%fn,fun(a,5

14、); yzj();yzj() FILE *IN,*OUT; int iIN10,i,j; float fOUT; IN=fopen(in.dat,r); if(IN=NULL) printf(Please Verify The Currernt Dir.It May Be Changed); OUT=fopen(out.dat,w); if(OUT=NULL) printf(Please Verify The Current Dir. It May Be Changed); for(j=0;j5;j+) for(i=0;i5;i+) fscanf(IN,%d,&iINi); fOUT=fun(

15、iIN,5); fprintf(OUT,%fn,fOUT); fclose(IN); fclose(OUT);11功能：对长度为7个字符的字符串，除首、尾字符外，将其余5个字符按降序排列。例如：原来的字符串为CEAedca,排序后输出为CedcEAa。-#include#include#includeint fun(char *s,int num) /*Program*/ Int I,j;Char t;For(i=1;inum-1;i+) For(j=j+1;jnum-1;j+) /* End */main() char s10; printf(输入7个字符的字符串:); gets(s); f

16、un(s,7); printf(n%s,s); NONO();NONO() int i; char a100; FILE *rf, *wf ; rf = fopen(in.dat, r) ; wf = fopen(out.dat, w) ; for(i=0;i0)S=s/100;t=s%10*s1+t;s1=s1*10; /* End */return t; main() long s, t,m; printf(nPlease enter s:); scanf(%ld, &s); m=fun(s,t); printf(The result is: %ldn, m); yzj();yzj() F

17、ILE *IN,*OUT; int n; long i,t,m; IN=fopen(in.dat,r); if(IN=NULL) printf(Read File Error); OUT=fopen(out.dat,w); if(OUT=NULL) printf(Write File Error); for(n=0;n5;n+) fscanf(IN,%ld,&i); m=fun(i,t); fprintf(OUT,%ldn,m); fclose(IN); fclose(OUT);13功能：编写函数fun计算下列分段函数的值： x2+x+6 x0且x-3 f(x)= x2-5x+6 0x10且x

18、2及x3 x2-x-1 其它-#include stdio.hfloat fun(float x) /*Program*/float y;if(x=0&x10.0&x!=2.0&x!=3.0)y=x*x-5*x+6;else y=x*x-x-1;return y; /* End */main() float x,f; printf(Input x=); scanf(%f,&x); f=fun(x); printf(x=%f,f(x)=%fn,x,f); yzj();yzj() FILE *IN,*OUT; int n; float i; float o; IN=fopen(in.dat,r);

19、 if(IN=NULL) printf(Read File Error); OUT=fopen(out.dat,w); if(OUT=NULL) printf(Write File Error); for(n=0;n10;n+) fscanf(IN,%f,&i); o=fun(i); fprintf(OUT,%fn,o); fclose(IN); fclose(OUT);14功能：编写函数用冒泡排序法对数组中的数据进行从小到大的排序。-#include #includevoid sort(int a,int n) /*Program*/int i,j,t;for(i=0;in-1;i+)for

20、(j=0;jaj+1)t=aj;aj=aj+1;aj+1=t; /* End */main() int a16,i; for(i=0;i16;i+) ai=rand()%(30)+15; for(i=0;i16;i+) printf(%3d,ai); printf(n-n); sort(a,16); for(i=0;i16;i+) printf(%3d,ai); yzj();yzj() FILE *IN,*OUT; int n; int i10; int o; IN=fopen(in.dat,r); if(IN=NULL) printf(Read File Error); OUT=fopen(

21、out.dat,w); if(OUT=NULL) printf(Write File Error); for(n=0;n10;n+) fscanf(IN,%d,&in); sort(i,10); for(n=0;n10;n+) fprintf(OUT,%dn,in); fclose(IN); fclose(OUT);15题目：用函数求一个N阶方阵右下三角元素的和（包括副对角线上的元素）。 -#include #include stdio.h#define N 3int sum(int aN) /*Program*/int I,j,k=0;for(i=0;iN;i+)for(j=N-1;jN;j

22、+)k=k+aij;return (k); /* End */main() int aNN,i,j; for(i=0;iN;i+) for(j=0;jN;j+) aij=rand()%(10)+10; printf(%3d,aij); printf(n); printf(=n); printf(sum=%5dn,sum(a); yzj();yzj() FILE *IN,*OUT; int m,n; int i33; int o; IN=fopen(in.dat,r); if(IN=NULL) printf(Read File Error); OUT=fopen(out.dat,w); if(O

23、UT=NULL) printf(Write File Error); for(m=0;m3;m+) for(n=0;n3;n+) fscanf(IN,%d,&imn); o=sum(i); fprintf(OUT,%dn,o); fclose(IN); fclose(OUT);16功能：根据整型形参m，计算如下公式的值：y=sin(m)*10。例如：若m=9，则应输出：4.121185-#include stdio.h#includemath.hdouble fun(int m) /*Program*/double y=0;y=sin(m)*10;return (y); /* End */ma

24、in() int n; printf(Enter n: ); scanf(%d, &n); printf(nThe result is %1fn, fun(n); yzj(); yzj() FILE *IN,*OUT; int s,i ; int t; float o; IN=fopen(in.dat,r); if(IN=NULL) printf(Read File Error); OUT=fopen(out.dat,w); if(OUT=NULL) printf(Write File Error); for(i=0;istrlen(str) printf(删除位置i和待删字符个数n的值错！请

25、重新输入i和n的值n); scanf(%d%d,&i,&n); fun(str,i,n); printf(删除后的字符串str是:%sn,str); yzj();fun(char str,int i,int n) /*Program*/While(stri+n-1)Stri-1=stri+n-1;i+;Stri-1=0; /* End */yzj() FILE *IN,*OUT; int n; char i200; char o200; IN=fopen(in.dat,r); if(IN=NULL) printf(Read File Error); OUT=fopen(out.dat,w);

26、if(OUT=NULL) printf(Write File Error); fscanf(IN,%s,i); fun(i,2,8); fprintf(OUT,%sn,i); fclose(IN); fclose(OUT);18功能：统计出若干个学生的平均成绩，最高分以及得最高分的人数。例如：输入10名学生的成绩分别为92，87，68，56，92，84，67，75，92，66，则输出平均成绩为77.9，最高分为92，得最高分的人数为3人。-#include stdio.hfloat Max=0;int J=0;float fun(float array,int n) /*Program*/in

27、ti;float sum=0,ave;max=array0;for(i=0;in;i+)if(Maxarrayi)max=arrayi;ave=sum+arrayi;for(i=0;in;i+)if(arrayi=Max)J+;return(ave) /* End */ main( ) float a10,ave; int i=0; for(i=0;i10;i+) scanf(%f,&ai); ave=fun(a,10); printf(ave=%fn,ave); printf(max=%fn,Max); printf(Total:%dn,J); yzj();yzj() FILE *IN,*O

28、UT; float iIN10,iOUT; int iCOUNT; IN=fopen(in.dat,r); if(IN=NULL) printf(Please Verify The Currernt Dir.It May Be Changed); OUT=fopen(out.dat,w); if(OUT=NULL) printf(Please Verify The Current Dir. It May Be Changed); for(iCOUNT=0;iCOUNT10;iCOUNT+) fscanf(IN,%f,&iINiCOUNT); iOUT=fun(iIN,10); fprintf(

29、OUT,%f %fn,iOUT,Max); fclose(IN); fclose(OUT);19功能：编写程序，实现矩阵（3行3列）的转置（即行列互换） 例如：输入下面的矩阵： 100 200 300 400 500 600 700 800 900 程序输出： 100 400 700 200 500 800 300 600 900 -#include stdio.hint fun(int array33) /*Program*/ Int i,j,t;For(i=0;i3;i+)For(j=0;jI;j+)t=arrayij=arrayji; arrayij=arrayji;arrayji=t;

30、 /* End */ main() int i,j; int array33=100,200,300, 400,500,600, 700,800,900; for (i=0; i 3; i+) for (j=0; j 3; j+) printf(%7d,arrayij); printf(n); fun(array); printf(Converted array:n); for (i=0; i 3; i+) for (j=0; j 3; j+) printf(%7d,arrayij); printf(n); NONO(); NONO() int i,j, array33; FILE *rf,

31、*wf ; rf = fopen(in.dat, r) ; wf = fopen(out.dat, w) ; for (i=0; i 3; i+) for (j=0; j 3; j+) fscanf(rf, %d, &arrayij); fun(array); for (i=0; i 3; i+) for (j=0; j 3; j+) fprintf(wf, %7d, arrayij); fprintf(wf, n); fclose(rf) ; fclose(wf) ; 20功能：用函数实现字符串的复制, 不允许用strcpy()函数。-#include stdio.hvoid copy(ch

32、ar str1,char str2) /*Program*/int i;for(i=0;str1i!=0;i+)str2i=str1i;str2i=0; /* End */main() void copy(); char c140,c240; gets(c1); copy(c1,c2); puts(c2); yzj();yzj() FILE *IN,*OUT; int n; char i100; char o100; IN=fopen(in.dat,r); if(IN=NULL) printf(Read File Error); OUT=fopen(out.dat,w); if(OUT=NUL

33、L) printf(Write File Error); fscanf(IN,%s,i); copy(i,o); fprintf(OUT,%sn,o); fclose(IN); fclose(OUT);21功能：从键盘为一维整型数组输入10个整数，调用fun函数找出其中最小的数，并在main函数中输出。请编写fun函数。-#include stdio.hint fun(int x,int n) /*Program*/Int min,I;Min=x0;For(i=1;in;i+)If(ximin)min=xi;Return min; /* End */main() int a10,i,min;

34、for(i=0;i10;i+) scanf(%d,&ai); for(i=0;i10;i+) printf(%3d,ai); printf(n); min=fun(a,10); printf(%dn,min); yzj();yzj() FILE *IN,*OUT; int iIN10,i; int iOUT,iCOUNT; IN=fopen(4.in,r); if(IN=NULL) printf(Please Verify The Currernt Dir.It May Be Changed); OUT=fopen(4.out,w); if(OUT=NULL) printf(Please Verify The Current Dir. It May Be Changed); for(i=0;i10;i+) for(iCOU