福建省計算機二級C語言上機題解析

1、第一部分：程序修改題#include #include #include #include void main() char str1100, t200; int i, j; /*/ i = 0; /*/ 改成 j = 0;clrscr(); strcpy(str1, 4az18c?ge9a0z!); for (i = 0; istrlen(str1); i+) /*/ if (str1i %2= 0) & (i%2!=0 ) /*/ 改成 i%2 =0 tj = str1i; j+; tj = 0; printf(n original string: %sn, str1); prin

2、tf(n result string: %sn, t); #include #include #include #include #define m 50 double fun(int n) double y = 0.0; int i,j; j=0; for(i=1;i+) /*/ if( i10 /*/ y+=1/i; /*/ 改成 y+=1.0/i;j+; if(j=n) break; return y; void main() clrscr(); printf(fun(8) = %8.3lfn, fun(8); #include void main() /*/ int i,j; /*/

3、改成 int i,j,k;for(i=1;i=6;i+) for(k=1;k=10+i;k+) printf( ); for(j=1;j=7-i;j+) printf(*)/*/ : /*/ 改成 ;printf(n); getch(); #include #include /*/int fun();/*/ 該處不是函數(shù)說明，應(yīng)該去掉分號 int hen,cock,chicken,n=0; clrscr(); for(cock=0;cock=50;cock+=1) for(hen=0;henhen:%d,cock:%d,chicken:%dn,n,hen,cock,chicken); if(n

4、=20) getch(); return n; void main() int num; num=fun(); printf(n there are %d solutions.n,num); getch(); #include #include void main() int m,n,result,flag=0; /*/ char ch, /*/ 基本語法錯誤，逗號改成分號clrscr(); printf(input an expression: ); scanf(%d%c%d,&m,&ch,&n); /*/ switch ch /*/ 基本格式錯誤，改成switch(

5、ch) case +: result=m+n; break; case -: result=m-n; break; case *: result=m*n; break; case %: result=m%n; break; case /: result=m/n; break; default: printf(error!n); flag=1; if (!flag) printf(%d %c %d = %dn,m,ch,n,result); getch(); #include #include void main() char s20=table left 100,t20; /*/ char t

6、ab4,2=a,f,b,e,e,a,f,b; /*/ 數(shù)組定義形式錯誤，改成char tab42 int i,j=0; strcpy(t,s); while(tj) for(i=0;i=3;i+) if(tj=tabi0) /*/ tj=tabi2; /*/ 改成 tj=tabi1;break; j+; printf(nthe source string: %sn,s); printf(nthe target string: %sn,t); getch(); #include #include main() char str1128; /*/ int i,len; sum=0; /*/基本語法

7、錯誤，改成int i,len, sum=0;printf(nplease input the string: ); gets(str1); len = strlen(str1); for(i=0; i= 0 | str1i = 9) /*/ 邏輯錯誤， |改成 &sum+; printf(%dn,sum); getch(); #include #include #define m 8 main() int am,i; printf(please input 8 numbers:n); for(i=0; im; i+) scanf(%d, /*/ ai /*/); 輸入列表項必須指定地址

8、，改成&aiprintf(inverse order is: n); /*/ for(i=m-1; i=0printf(%d , ai); printf(n ); getch(); #include #include main() /*/ char str1 /*/; 此處必須定義成字符數(shù)組，改成char str150int i,len, sum=0; printf(please input a string:n); scanf(%s, str1); len = strlen(str1); for(i=0; i= a & str1i = z) /*/ sum-;/*/ 改成 s

9、um+; printf(%dn,sum); getch(); #include #include /*/ #include m 5/*/ 宏定義錯誤，改成#define m 5main() int am,i; printf(please input 5 numbers:n); for(i=0; im; i+) scanf(%d, &ai); printf(even numbers:n ); for(i=0; im; i+) /*/ if( ai/2 =0) /*/ 判斷偶數(shù)應(yīng)該改成ai%2 =0printf(%d , ai); printf(n ); getch(); #include

10、 #include main() char str1128, str2128; int i,len; gets(str1); len = strlen(str1); /*/ for(i=0; ilen; i+)/*/循環(huán)條件表示錯誤，改成for(i=0; i= 0 & str1i = 8) str2i = str1i + 1; else if(str1i = 9) str2i = 0; else str2i = str1i; /*/ str2i = n;/*/字符串的結(jié)束標(biāo)識應(yīng)該用0 表示puts(str2); getch(); #include #include void main(

11、) char s130=peoples republic of , s2=china; char * ps1,*ps2; /*/ ps1 = null; /*/指針 ps1 指向字符串s1 ，改成 ps1 = s1;ps2=s2; /*/ while( *ps1 = null) /*/判斷是否到達(dá)串尾標(biāo)識，應(yīng)改成*ps1!=0ps1+; while(*ps2) *(ps1+) = *(ps2+); printf(n%sn,s1); getch(); #include #include void main() float a3,s,area; int i; printf(please input

12、 3 numbers:n); for(i=0; ia2 | a1+a2a0 | a0+a2a1 ) /*/ 邏輯條件標(biāo)識錯誤，|改成 & s = (a0+a1+a2)/2; area = sqrt(s*(s-a0)*(s-a1)*(s-a2); printf(area is %.2fn,area); else printf(error.n); getch(); #include #include /*/ void fun() /*/ 此處說明函數(shù)有返回值，改成int fun() int large,middle,small,n=0; clrscr(); for( large=0;lar

13、ge=33;large+ ) for( middle=0;middlelarge:%d,middle:%d,small:%dn,n,large,middle,small); return n; void main() int num; num = fun(); printf(n there are %d solutions.n,num); getch(); #include void main() int i; /*/ for( i=100; i200; i+ );/*/ for 語句錯誤，此處去掉分號if(i-2)%4 = 0) if( !(i-3)%7) ) if( i%9 = 5 ) p

14、rintf(%dn,/*/ &i /*/); 去掉地址符號&getch(); #include /*/ void swap(int p1,int p2) /*/ 改成 void swap(int *p1,int *p2) int temp; temp = *p1; /*/ p1 = p2;/*/ 改成 *p1 = *p2;*p2 = temp; void main() int a,b; printf(please input 2 numbers:n); scanf(%d%d,&a,&b); printf(noriginal: a=%d b=%dn,a,b); s

15、wap(&a,&b); printf(nresult: a=%d b=%dn,a,b); getch(); #include void main() int b,i; /*/ int a=c=0;/*/基本語法錯誤，改成int a=0,c=0;/*/ for( i=0,i=100,i+=2 ) /*/ for 語句語法錯誤，改成for( i=0;i=100;i+=2 ) a+=i; b=i+1; c+=b; printf(total of even numbers: %dn,a); printf(total of odd numbers: %dn,c-101); getch()

16、; #include void main() int x,y,z,i,result=520; for( x=1;x10;x+ ) for( y=1;y10;y+ ) /*/ for( z=1;z10;z+ ) /*/ z 初值應(yīng)為0，改成 for( z=0;z10;z+ ) i=100*x+10*y+z+100*y+10*z+z; /*/ if (i=result) /*/邏輯關(guān)系等于應(yīng)該為i=resultprintf(x=%d,y=%d,z=%dn,x,y,z); getch(); #include #define f(x) (x*x-2.3*x+5.6)/(x+8.2) void main

17、() float a=6.0,b=3.0,c; /*/ int s; /*/ 變量類型錯誤，改成float s;printf(nplease input c: ); scanf(%f,/*/ c /*/); 輸入列表項必須加地址&c/*/ s=f(a,b,c); /*/ printf(ns=%.2fn,s); getch(); #include void main() int f,s,t,n; printf(nthe list is:n); for(n=100;n1000;n+) f=n%10; f 為個位數(shù)s=(n%100)/10; s 為十位數(shù)/*/ t=n%100; /*/ t

18、為百位數(shù)，應(yīng)改成t=n/100;/*/ if(t*t*t+s*s*s+f*f*f=n)/*/ 應(yīng)改成printf(%d ,n); printf(n); getch(); 第二部分：程序填空題#include void main() /*/ long /*/ p; int i; p=1; /*/ for /*/(i=1;i=8;i+) p=p*i; printf(np=%ld, p); getch(); #include void main() int a,b,c; float f; clrscr(); printf(please input a b :); scanf(%d%d,&a,

19、&b); f=/*/ 1.0*a/b /*/; c=/*/ (int) /*/ (f*100)%10; printf(n a/b=%f the second decimal place is: %dn,f,c); getch(); #include #include int max,min; void find_max_min(int *p,int n) int *q; max=min=*p; for(q=p; q/*/ p+n/*/; q+) if(/*/ max*q) min=*q; void main() int i,num10; printf(input 10 numbers:

20、 ); for(i=0;i10;i+) scanf(%d,&numi); find_max_min(/*/ num/*/,10); printf(max=%d,num=%dn,max,min); #include void main() int a,b,k; int plu = /*/ 403/*/; for(a=1; a10; a+) for(b=1; b10; b+) k = (a*10+b) * /*/ (b*10+a)/*/ ; if(k=plu) printf(a = %d, b = %dn,a,b); #include void main() int n,a,b; /*/

21、a=0; b=0; /*/ scanf(%d,&n); while(/*/ n!=0/*/) if(n0) a+; else /*/ b+;/*/ scanf(%d,&n); printf(positive integer: %d, negative integer: %dn,a,b); #include #include int prime(int n) int k,flag=1; for(k=2; k=n/2+1; k+) if (n%k=0) flag=/*/ 0/*/ ; break; return flag; void main() int num, a; clrsc

22、r(); do printf(please input an even number:); scanf(%d, &num); while(num=6|num%2=1); for(a=2;a=num/2+1;a+) if(prime(a) & prime(/*/ num-a/*/) printf(n %d = %d + %d , num, a, num-a); #include #include /*/ main()/*/ float x,x0,f,f1; x=1.5; do x0=x; f=(2*x0-4)*x0+3)*x0-6; f1=(6*x0-8)*x0+3; x=x0-

23、f/f1; /*/ while/*/(fabs(x-x0)=1e-6); printf(the root is: %.2fn,x); #include main() /*/ char /*/ str20; int i; float x; printf(please input a string:n); scanf(%s,/*/ str/*/ ); i=0; while(stri) stri=/*/ stri15;/*/ i+; printf(n target string: %sn, str); getch(); #include main( ) int a5=20,30,45,64,23;

24、float m; /*/ float average(int pa,int n);/*/ m=average(a, 5 ); printf(average=%fn,m); getch(); float average(int pa ,int n) int k; float avg=0.0; for(k=0;kn;k+) avg=avg+/*/ pak/*/; avg= avg/n; return avg; #include main() /*/ char/*/ s80; int i; printf(please input a string:); for(i=0;(si=getchar()!=

25、n;i+); si=0; for(i=0;si!=0;i+) if(si=a&si=a&si=z ) si=si+32; printf(%c,si); getch(); #include #include void sort(int a, int m) int i, j, t,swap; for( i=0; i /*/ m-1 /*/ ; i+ ) swap = 0; for( j=0; j m-i-1; j+) if /*/ (ajaj+1) /*/ swap = 1; t = aj; aj = /*/ aj+1 /*/; aj+1 = t; if(!swap) break;

26、 void main() int a = 23,55,8,32,18,2,9; int i,k = sizeof(a)/sizeof(int); sort(a,k); for(i=0;ik;i+) printf(%d ,ai); printf(n); getch(); #include #include int fun(/*/ float a,float b,float c/*/) float temp; int btrue = 0; if(ab) temp = a; a = b; b = temp; if(ac) temp = a; a = c; c = temp; if( fabs(/*/

27、 a*a/*/ - (b*b + c*c) 1.0e-15) btrue = 1; return btrue; main() float a,b,c; printf(please input three numbers:n); scanf(%f%f%f,&a,&b,&c); if( fun(a,b,c) = 1) printf(yesn); else printf(non); getch(); #include main() int x; printf(please input a number:n); scanf(%d,/*/ &x/*/); printf(%

28、d*%d=%dn, x,x,/*/ x*x/*/); getch(); #include #include void sort(int a, int m) int i, j, k, t; for( i = 0; i m-1; i+ ) k = i; for( j=i+1; j /*/ m/*/; j+) if( aj ak ) /*/ k=j/*/; if( k != i ) t = ak; ak= ai; ai = /*/ t/*/; void main() int a = 72,25,58,32,2,15,7,64; int i,m = sizeof(a)/sizeof(int); sor

29、t(a,m); for(i=0;im;i+) printf(%d ,ai); printf(n); getch(); #include main() float a,b,c,max; /*/float fmax(float x,float y,float z); /*/ printf(please input 3 integer:n); scanf(%f%f%f,&a,&b,&c); max=fmax(a,b,c); printf(the max number is:%.2fn, max); getch(); float fmax(float x,float y,flo

30、at z) float m,n; n=(yz)?y:z; m=/*/ (xn)?x:n;/*/ return(m); #include #include main() int i,/*/ j /*/; int a44,sum; sum=/*/ 0 /*/; printf(please input 16 numbers:n); for(i=0; i4;i+) for(j=0;j4;j+) scanf(%d,&aij); for(i=0;i4;i+) /*/ sum+=ai0; /*/ printf(%dn,sum); getch(); #include int fun(int a,int

31、 n,/*/int q /*/) int left,right,mid; left= 0 ; right = n-1; while(left = right) mid= /*/ (left+right)/2 /*/; if( q amid) left = mid+1; else return mid; return -1; main() int a=3,4,6,11,17,22,31,45; int k,n; n = sizeof(a)/sizeof(int); k = fun(a,n,31); printf(%dn,k); getch(); #include #include int fun

32、(/*/ float r /*/,float x,float y) int bin; bin = /*/ sqrt(x*x+y*y) /*/ r ; return bin; main() float r=-1,x,y; int bin; while(r0):n); scanf(%f, &r); printf(please input the dot(x,y):n); scanf(%f%f,&x,&y); bin = fun(r,x,y); if(bin = 1) printf(in the circle!n); else printf(out of the circle

33、!n); getch(); #include /*/#include /*/ double fun(double x) /*/return x*x-2*x+6; /*/ void main() double x,y1,y2; clrscr(); printf(please input x:); scanf(%lf,&x); y1=fun(x+8); y2=fun(/*/ sin(x) /*/); printf(nf(x+8)=%.3lf,y1); printf(nf(sinx)=%.3lf,y2); getch(); #include double fun(unsigned m,uns

34、igned n) unsigned i; double p=1.0; for(i=1;i=m;i+) /*/ p=p*i;/*/ for(i=1;i=n;i+) /*/ p=p/i; /*/ for(i=1;i=m-n;i+) p=p/i; return p; void main() clrscr(); printf(p=%fn,fun(13,7); getch(); #include int findmax(int* array,int size); void main() int a=33,91,23,45,56,-12,32,12,5,90; clrscr(); printf(the m

35、ax is %dn,/*/findmax(a,10) /*/); getch(); int findmax(int *array,int size) int i, /*/ max=*array/*/; for(i=1; imax) max=arrayi; return max; #include unsigned sum(unsigned n) unsigned i,/*/sum=0; /*/ for(i=1;i=n;i+) sum+=i; /*/return sum;/*/ void main() int m; clrscr(); printf(please input a unsigned

36、 integer:); scanf(%d,&m); while(m0) printf(please input a unsigned integer:); scanf(%d,&m); printf(nthe sum is %dn,/*/sum(m) /*/); getch(); #include #include void main() int i,j; char str=1234567, /*/ k/*/; for(i=0,/*/ j=strlen(str)-1 /*/;ij;i+,j-) k=stri; stri=strj; strj=k; clrscr(); printf

37、(%sn,str); getch(); #include #include typedef struct int num; char name20,sex2; int age,score; stu; stu mystudent= 1111,zhangqiang,m,20,80, 2104,liminghong,w,18,82, 3121,wangxingda,m,21,78, 4118,liushaotao,m,20,90, 1456,wuminghong,w,35,86 ; void sort(stu* ps, int size) int i,flag,pass; /*/ stu temp;

38、/*/ for(pass=1;passsize;pass+) flag=0; for(i=0;ipsi+1.num /*/) flag+=1; temp=psi;psi=psi+1;psi+1=temp; if(/*/ flagsize /*/) break; void main() int i,size=sizeof(mystudent)/sizeof(stu); clrscr(); printf(students information before sort:nn); printf(number name age sex scorenn); for(i=0;inum, (mystuden

39、t+i)-name,(mystudent+i)-age, (mystudent+i)-sex, (mystudent+i)-score); sort(mystudent,size); printf(nstudents information after sort:nn); printf(number name age sex scorenn); for(i=0;inum, (mystudent+i)-name,(mystudent+i)-age, (mystudent+i)-sex,(mystudent+i)-score); getch(); #includestdio.h #define r

40、ow 3 #define col 3 void main() int arowcol,i,j,max,min; clrscr(); printf(please input the 9 integers:n); for(i=0;irow;i+) for(j=0;jcol;j+) scanf(%d,&aij); /*/max=min=a00; /*/ for(i=0;irow;i+) for(j=0;jmax /*/) max=aij; if(aijmin) /*/min=aij;/*/ printf(max=%dn,max); printf(min=%dn,min); getch();

41、#define n 5 #include void main() int t=0,/*/ s=0 /*/,i; for(i=1;i=n;i+) t=/*/ t*10+i /*/; s+=t; clrscr(); printf(ns=%dn,s); getch(); #include long fib(int n); void main() int k; clrscr(); printf(the first 15 data of fibonacci is:nn); for(k=1;k=15;k+) printf(%d ,fib(k); printf(n); getch(); long fib(i

42、nt n) if(n=1|n=2) /*/ return 1; /*/ else return /*/ fib(n-1)+fib(n-2) /*/; #include main() struct stu char name10; float score; ; /*/struct stu /*/ stu3=mary,76,john,85,tom,81; int i=0; float total=0,aver=0; while(i3) total=total+/*/stui.score /*/; i+; aver=total/3; printf(ntotal=%.2f,aver=%.2f, tot

43、al,aver); getch(); #include main() int i,a10=9,26,35,8,6,19,69,3,5,95; int min1,min2; i=0; min1=a0a1?/*/a0:a1; /*/ for(i=2;i10;i+) if(aimin1) min2=min1; min1=ai; else if(aimin2) /*/min2=ai; /*/ printf(min1=%d,min2=%dn, min1,min2); getch(); #include main() double x,y; /*/double mysqrt(double a,double

44、 x0); /*/ printf(please input x:n); scanf(%lf,&x); y=mysqrt(x,1.0); printf(the sqrt of %f=%fn,x,y); getch(); double mysqrt(double a,double x0) double x1,y; x1=/*/ 1.0/2*(x0+a/x0); /*/ if(fabs(x1-x0)0.00001) y=mysqrt(/*/ a,x1 /*/); else y=x1; return(y); 第三部分：程序設(shè)計題#include #include double fun1(dou

45、ble x) /*/ return (1+sin(x)+exp(x)/(1+x); /*/ void main() clrscr(); printf(fun1(0.76) = %8.3lfn, fun1(0.76); printf(fun1(3.00) = %8.3lfn, fun1(3.00); printf(fun1(3.76) = %8.3lfn, fun1(3.76); #include #include #include #include int fun2(int a,int n,int b,int c) /*/ int i,j,t,k=0; for(i=0;i-20)bk+=ai;

46、 for(i=0;ik;i+)ci=bi; for(i=0;ik;i+) for(j=0;jcj+1) t=cj; cj=cj+1; cj+1=t; return k; /*/ void main() int n = 10, i, nb; int aa10 = 12, -10, -31, -18, -15, 50, 17, 15, -20, 20; int bb10, cc10; clrscr(); printf(there are %2d elements in aa.n, n); printf(they are: ); for(i=0; in; i+) printf(%6d, aai);

47、printf(n); nb = fun2(aa, n, bb, cc); printf(elements in bb are: ); for (i=0; inb; i+) printf(%6d, bbi); printf(n); printf(elements in cc are: ); for(i=0; inb; i+) printf(%6d, cci); printf(n); printf(there are %2d elements in bb.n, nb); #include #include double fun1(double x) /*/ return (exp(x)+fabs(

48、x-6)/(x+1.3); /*/ void main() clrscr(); printf(fun1(0.76) = %8.3lfn, fun1(0.76); printf(fun1(3.00) = %8.3lfn, fun1(3.00); printf(fun1(3.76) = %8.3lfn, fun1(3.76); #include #include #include #include void fun2(char a,char b,char c) /*/ char t15; if(strcmp(a,b)0)strcpy(t,a);strcpy(a,b);strcpy(b,t); if

49、(strcmp(a,c)0)strcpy(t,a);strcpy(a,c);strcpy(c,t); if(strcmp(b,c)0)strcpy(t,b);strcpy(b,c);strcpy(c,t); /*/ void main() char str115=fuzhou,str215=fujian,str315=china; clrscr(); fun2(str1,str2,str3); printf(the ordered strings is : %s, %s, %sn,str1,str2,str3); getch(); #include #include double fun1(f

50、loat x) /*/ if(x5) return exp(x)+0.9; else if(x=5) return 12.5; else return (sin(x)-7.8)/(2*x); /*/ void main() float x; double y; clrscr(); printf(please input a number:n); scanf(%f,&x); y = fun1(x); printf(fun1(%.2f)=%.2fn,x,y); getch(); #include #include void main() int fun(); int num; num=fu

51、n(); printf(nthe total of prime is %d,num); getch(); int fun() /*/ int m,i,k,n=0; for(m=101;m=200;m=m+2) k=sqrt(m); for(i=2;i=k+1)n+; return n; /*/ #include #include double f(float x) /*/ if(x0) return (fabs(x)+3.2)/(sin(x)+2); else return 0; /*/ void main() float x; double y; printf(please input a

52、number: n); scanf(%f,&x); y = f(x); printf(f(%.3f)=%.3fn,x,y); getch(); #include #include void fun(int a,int m) /*/ int i; a0=a1=1; for(i=2;im;i+) ai=ai-1+ai-2; /*/ void main() int a20,i; fun(a,20); for(i=0; i20; i+) printf(%d ,ai); printf(n); getch(); #include #include double f(float x) /*/ if(

53、fabs(x)700)return sqrt(5.8+fabs(x)/(cos(x)+2.1); else return -1; /*/ void main() float x; double y; printf(please input a number: n); scanf(%f,&x); y = f(x); printf(f(%0.2f)=%0.2fn,x,y); getch(); #include #include int fun(int a3,int m) /*/ int i,j,flag=1; for(i=0;im;i+) for(j=0;jm;j+) if(aij!=aj

54、i) flag=0;break; if(flag)return 1; else return 0; /*/ void main() int a33,i,j; int b; for(i=0; i3; i+) for(j=0; j3; j+) scanf(%d,&aij); b = fun(a,3); if( b = 1 ) printf(yesn); else printf(non); getch(); #include #include double f(float x) /*/ double y; if(x2)y=x; else if(x5)y=3-tan(3.5-x); else

55、y=3*log10(x)-11; return y; /*/ void main() float x; double y; clrscr(); printf(please input x :n); scanf(%f,&x); y = f(x); printf(f(%.2f)=%.2fn,x,y); getch(); #include #include char fun(float f) /*/ float c; c=5.0/9*(f-32); if(c0) return w; else if(c25) return b; else if(c35) return o; else retu

56、rn r; /*/ void main() float f; char code; printf(nplease input the fahrenheit temperature: ); scanf(%f,&f); code=fun(f); printf(n%cn,code); getch(); #include #include double f(float x) /*/ float y; if(x=1600)y=0; else if(x=2100)y=(x-1600)*0.05; else if(x=3100)y=(x-1600)*0.1-25; else y=(x-1600)*0.15-125; return y; /*/ void main() float x; double y; clrscr(); printf(please input a number:n); scanf(%f,&x); y = f(x); printf(f(%.2f)=%.2fn,x,y); getch(); #include #define row 4 #define col 4 int fun(int acol,int row,int b) /