福建省计算机二级C语言上机题解析.doc

C语言上机题解析第一部分：程序修改题#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); printf(n Result string: %sn, t);#include #include #include #include #define M 50double 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;/*/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();/*/该处不是函数说明，应该去掉分号 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=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, /*/基本语法错误，逗号改成分号 clrscr(); printf(Input an expression: ); scanf(%d%c%d,&m,&ch,&n); /*/ switch ch /*/基本格式错误，改成switch(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 tab4,2=a,f,b,e,e,a,f,b; /*/数组定义形式错误，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; /*/基本语法错误，改成int i,len, sum=0; printf(nPlease input the string: ); gets(str1); len = strlen(str1); for(i=0; i= 0 | str1i = 9) /*/逻辑错误，|改成& sum+; printf(%dn,sum); getch();#include #include #define M 8main() int aM,i; printf(Please input 8 numbers:n); for(i=0; iM; i+) scanf(%d, /*/ ai /*/);输入列表项必须指定地址，改成&ai printf(Inverse order is: n);/*/ for(i=M-1; i=0 printf(%d , ai); printf(n ); getch();#include #include main() /*/ char str1 /*/;此处必须定义成字符数组，改成char str150 int 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sum+; printf(%dn,sum); getch();#include #include /*/ #include M 5 /*/宏定义错误，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) /*/判断偶数应该改成ai%2 =0 printf(%d , ai); printf(n ); getch();#include #include main() char str1128, str2128; int i,len; gets(str1); len = strlen(str1);/*/ for(i=0; ilen; i+) /*/循环条件表示错误，改成for(i=0; i= 0 & str1i = 8) str2i = str1i + 1; else if(str1i = 9) str2i = 0; else str2i = str1i; /*/ str2i = n; /*/字符串的结束标识应该用0表示 puts(str2); getch();#include #include void main() char s130=Peoples Republic of , s2=China; char * ps1,*ps2; /*/ ps1 = NULL; /*/指针ps1指向字符串s1，改成ps1 = s1; ps2=s2; /*/ while(*ps1 = NULL) /*/判断是否到达串尾标识，应改成*ps1!=0 ps1+; while(*ps2) *(ps1+) = *(ps2+); printf(n%sn,s1); getch();#include #include void main() float a3,s,area; int i; printf(Please input 3 numbers:n); for(i=0; ia2 | a1+a2a0 | a0+a2a1 ) /*/逻辑条件标识错误，|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() /*/此处说明函数有返回值，改成int fun() int large,middle,small,n=0; clrscr(); for( large=0;large=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语句错误，此处去掉分号 if(i-2)%4 = 0) if( !(i-3)%7) ) if( i%9 = 5 ) printf(%dn,/*/ &i /*/); 去掉地址符号& 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); swap(&a,&b); printf(nResult: a=%d b=%dn,a,b); getch();#include void main() int b,i;/*/ int a=c=0; /*/基本语法错误，改成int a=0,c=0;/*/ for( i=0,i=100,i+=2 ) /*/for语句语法错误，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();#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初值应为0，改成for( z=0;z10;z+ ) i=100*x+10*y+z+100*y+10*z+z; /*/ if (i=result) /*/逻辑关系等于应该为i=result printf(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() float a=6.0,b=3.0,c; /*/ int s; /*/变量类型错误，改成float s; printf(nPlease input c: ); scanf(%f,/*/ c /*/);输入列表项必须加地址&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为个位数 s=(n%100)/10; s为十位数 /*/t=n%100; /*/t为百位数，应改成t=n/100; /*/if(t*t*t+s*s*s+f*f*f=n)/*/应改成 printf(%d ,n); printf(n); getch();第二部分：程序填空题#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,&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: ); 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; /*/ 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; clrscr(); 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-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; 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()!=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; 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(/*/ 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(%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); sort(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,float 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 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(/*/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!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();#includedouble fun(unsigned m,unsigned 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();#includeint findmax(int* array,int size);void main() int a=33,91,23,45,56,-12,32,12,5,90; clrscr(); printf(The max is %dn,/*/findmax(a,10) /*/); getch();int findmax(int *array,int size) int i, /*/max=*array /*/; for(i=1; imax) max=arrayi; return max;#includeunsigned 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 integer:); scanf(%d,&m); while(m0) printf(Please input a unsigned integer:); scanf(%d,&m); printf(nThe sum is %dn,/*/sum(m)/*/); getch();#include#includevoid 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(%sn,str); getch();#include#includetypedef 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; /*/ 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, (mystudent+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 ROW 3#define COL 3void 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();#define N 5#includevoid main() int t=0,/*/s=0/*/,i; for(i=1;i=N;i+) t=/*/t*10+i /*/; s+=t; clrscr(); pr