二级C语言题库答案.doc

第1套题一、程序填空题#include #include #define N 5typedef struct int num; char name10; char tel10;STYPE;void check();/*found*/int fun(STYPE*std)/*found*/ FILE *fp; int i; if(fp=fopen(myfile5.dat,wb)=NULL) return(0); printf(nOutput data to file !n); for(i=0; iN; i+)/*found*/ fwrite(&stdi, sizeof(STYPE), 1, fp); fclose(fp); return (1);二、程序改错题#include #include void fun (char *s, char *t) int i, sl; sl = strlen(s);/*found*/ for( i=0; i=sl; i +) ti = si; for (i=0; isl; i+)tsl+i = ssl-i-1;/*found*/ tsl+sl = 0;main() char s100, t100; printf(nPlease enter string s:); scanf(%s, s); fun(s, t); printf(The result is: %sn, t);第2套题一、程序填空题#include #include #include void WriteText(FILE *);void ReadText(FILE *);main() FILE *fp; if(fp=fopen(myfile4.txt,w)=NULL) printf( open fail!n); exit(0); WriteText(fp); fclose(fp); if(fp=fopen(myfile4.txt,r)=NULL) printf( open fail!n); exit(0); ReadText(fp); fclose(fp);/*found*/void WriteText(FILE *fw) char str81; printf(nEnter string with -1 to end :n); gets(str); while(strcmp(str,-1)!=0) /*found*/ fputs(str,fw); fputs(n,fw); gets(str); void ReadText(FILE *fr) char str81; printf(nRead file and output to screen :n); fgets(str,81,fr); while( !feof(fr) ) /*found*/ printf(%s,str); fgets(str,81,fr); 二、程序改错题#include /*found*/void fun (long s, long* t) long sl=10; *t = s % 10; while ( s 0) s = s/100; *t = s%10 * sl + *t;/*found*/sl = sl*10; main() long s, t; printf(nPlease enter s:); scanf(%ld, &s); fun(s, &t); printf(The result is: %ldn, t);第3套题一、程序填空题#include #include int fun(char *fname ) FILE *fp; int i,n; float x; if(fp=fopen(fname, w)=NULL) return 0; for(i=1;i=10;i+)/*found*/ fprintf(fp,%d %fn,i,sqrt(double)i); printf(nSucceed!！n);/*found*/ Fclose(fp); printf(nThe data in file :n);/*found*/ if(fp=fopen(myfile3.tex,r)=NULL) return 0; fscanf(fp,%d%f,&n,&x); while(!feof(fp) printf(%d %fn,n,x); fscanf(fp,%d%f,&n,&x); fclose(fp); return 1;main() char fname=myfile3.txt; fun(fname);二、程序改错题#include #include void fun ( int n, int *a ) int i, j, p, t; for ( j = 0; jn-1 ; j+ ) p = j;/*found*/ for ( i=j+1; iai )/*found*/ p=i; if ( p!=j ) t = aj; aj = ap; ap = t; void putarr( int n, int *z ) int i; for ( i = 1; i = n; i+, z+ ) printf( %4d, *z ); if ( !( i%10 ) ) printf( n ); printf(n);main() int aa20=9,3,0,4,1,2,5,6,8,10,7, n=11; printf( nnBefore sorting %d numbers:n, n ); putarr( n, aa ); fun( n, aa ); printf( nAfter sorting %d numbers:n, n ); putarr( n, aa );第4套题一、程序填空题#include #include int fun(char *source, char *target) FILE *fs,*ft; char ch;/*found*/ if(fs=fopen(source, r )=NULL) return 0; if(ft=fopen(target, w)=NULL) return 0; printf(nThe data in file :n); ch=fgetc(fs);/*found*/ while(!feof(fs) putchar( ch );/*found*/ fputc(ch,ft); ch=fgetc(fs); fclose(fs); fclose(ft); printf(nn); return 1;二、程序改错题#include void fun (long s, long *t) int d; long sl=1; *t = 0; while ( s 0) d = s%10;/*found*/ if (d%2=0) *t=d* sl+ *t; sl *= 10; /*found*/ s/= 10; main() long s, t; printf(nPlease enter s:); scanf(%ld, &s); fun(s, &t); printf(The result is: %ldn, t);第5套题一、程序填空题#include #include #define N 8typedef struct list int data; struct list *next; SLIST;void fun( SLIST *h, int x) SLIST *p, *q, *s; s=(SLIST *)malloc(sizeof(SLIST);/*found*/ s-data=x; q=h; p=h-next; while(p!=NULL & xp-data) /*found*/ q=p; p=p-next; s-next=p;/*found*/ q-next=s;SLIST *creatlist(int *a) SLIST *h,*p,*q; int i; h=p=(SLIST *)malloc(sizeof(SLIST); for(i=0; idata=ai; p-next=q; p=q; p-next=0; return h;void outlist(SLIST *h) SLIST *p; p=h-next; if (p=NULL) printf(nThe list is NULL!n); else printf(nHead); do printf(-%d,p-data); p=p-next; while(p!=NULL); printf(-Endn); 二、程序改错题#include long fun (long num)/*found*/ long k=1; do k*=num%10 ;/*found*/ Num/=10 ; while(num) ; return (k) ;main( ) long n ; printf(nPlease enter a number:) ; scanf(%ld,&n) ; printf(n%ldn,fun(n) ;第6套题一、程序填空题#include #include #define N 8typedef struct list int data; struct list *next; SLIST;void fun( SLIST *p) SLIST *t, *s; t=p-next; s=p; while(t-next != NULL) s=t;/*found*/ t=t-next; /*found*/ printf( %d ,t-data); s-next=NULL;/*found*/ free(t);SLIST *creatlist(int *a) SLIST *h,*p,*q; int i; h=p=(SLIST *)malloc(sizeof(SLIST); for(i=0; idata=ai; p-next=q; p=q; p-next=0; return h;void outlist(SLIST *h) SLIST *p; p=h-next; if (p=NULL) printf(nThe list is NULL!n); else printf(nHead); do printf(-%d,p-data); p=p-next; while(p!=NULL); printf(-Endn); 二、程序改错题#include /*found*/fun (char*a) if ( *a ) fun(a+1) ;/*found*/ printf(%c, *a) ; main( ) char s10=abcd; printf(处理前字符串=%sn处理后字符串=, s); fun(s); printf(n) ;第7套题一、程序填空题#include #include #define N 8typedef struct list int data; struct list *next; SLIST;void fun( SLIST *h) SLIST *p, *q; p=h-next; if (p!=NULL) q=p-next; while(q!=NULL) if (p-data=q-data) p-next=q-next;/*found*/ free(q);/*found*/ q=p-next; else p=q;/*found*/ q=q-next; SLIST *creatlist(int *a) SLIST *h,*p,*q; int i; h=p=(SLIST *)malloc(sizeof(SLIST); for(i=0; idata=ai; p-next=q; p=q; p-next=0; return h;二、程序改错题#include #define N 20void fun(int a, int n) int i, j, t, p; for (j = 0 ;j n-1 ;j+) /*found*/ p = j; for (i = j+1;i n; i+) if(ai ap)/*found*/ p =i; t = ap ; ap = aj ; aj = t; main() int aN=9,6,8,3,-1,i, m = 5; printf(排序前的数据:) ; for(i = 0;i m;i+) printf(%d ,ai); printf(n); fun(a,m); printf(排序后的数据:) ; for(i = 0;i m;i+) printf(%d ,ai); printf(n);第8套题一、程序填空题#include #include #define N 8typedef struct list int data; struct list *next; SLIST;SLIST *creatlist(char *);void outlist(SLIST *);int fun( SLIST *h, char ch) SLIST *p; int n=0; p=h-next;/*found*/ while(p!=NULL) n+;/*found*/ if (p-data=ch) return n; else p=p-next; return 0;main() SLIST *head; int k; char ch; char aN=m,p,g,a,w,x,r,d; head=creatlist(a); outlist(head); printf(Enter a letter:); scanf(%c,&ch);/*found*/ k=fun(head,ch); if (k=0) printf(nNot found!n); else printf(The sequence number is : %dn,k);SLIST *creatlist(char *a) SLIST *h,*p,*q; int i; h=p=(SLIST *)malloc(sizeof(SLIST); for(i=0; idata=ai; p-next=q; p=q; p-next=0; return h;void outlist(SLIST *h) SLIST *p; p=h-next; if (p=NULL) printf(nThe list is NULL!n); else printf(nHead); do printf(-%c,p-data); p=p-next; while(p!=NULL); printf(-Endn); 二、程序改错题#include #include #include fun ( char *p) int i,t; char c80;/*found*/ for (i = 0,t = 0; pi ; i+) if(!isspace(*(p+i) ct+=pi;/*found*/ ct= 0; strcpy(p,c);main( ) char c,s80; int i=0; printf(Input a string:); c=getchar(); while(c!=#) si=c;i+;c=getchar(); si=0; fun(s); puts(s);第9套题一、程序填空题#include #include #define N 8typedef struct list int data; struct list *next; SLIST;SLIST *creatlist(int *a);void outlist(SLIST *);void fun( SLIST *h, int *n) SLIST *p;/*found*/ *n=0; p=h-next; while(p) (*n)+;/*found*/ p=p-next; main() SLIST *head; int aN=12,87,45,32,91,16,20,48, num; head=creatlist(a); outlist(head);/*found*/ fun(head, &num); printf(nnumber=%dn,num);SLIST *creatlist(int a) SLIST *h,*p,*q; int i; h=p=(SLIST *)malloc(sizeof(SLIST); for(i=0; idata=ai; p-next=q; p=q; p-next=0; return h;二、程序改错题#include #include char * fun (char *s, char *t ) char *p , *r, *a;/*found*/ a = NULL; while ( *s ) p = s; r = t; while ( *r )/*found*/ if (* r =* p ) r+; p+; else break; if ( *r = 0 ) a = s; s+; return a ;main() char s100, t100, *p; printf(nPlease enter string S :); scanf(%s, s ); printf(nPlease enter substring t :); scanf(%s, t ); p = fun( s, t ); if ( p ) printf(nThe result is : %sn, p); else printf(nNot found !n );第10套题一、程序填空题#include #include #define N 8typedef struct list int data; struct list *next; SLIST;SLIST *creatlist(int *);void outlist(SLIST *);int fun( SLIST *h) SLIST *p; int s=0; p=h-next; while(p) /*found*/ s+= p-data;/*found*/ p=p-next; return s;main() SLIST *head; int aN=12,87,45,32,91,16,20,48; head=creatlist(a); outlist(head);/*found*/ printf(nsum=%dn, fun(head);SLIST *creatlist(int a) SLIST *h,*p,*q; int i; h=p=(SLIST *)malloc(sizeof(SLIST); for(i=0; idata=ai; p-next=q; p=q; p-next=0; return h;二、程序改错题#include #include void fun (char *s, char *t1, char *t2 , char *w) char *p , *r, *a; strcpy( w, s ); while ( *w ) p = w; r = t1;/*found*/ while (* r ) if ( *r = *p ) r+; p+; else break; if ( *r = 0 ) a = w; r = t2; while ( *r )/*found*/ *a = *r; a+; r+; w += strlen(t2) ; else w+; 第11套题一、程序填空题#include #include #define M 5#define N 20int fun(char (*ss)N, int *n) int i, k=0, len= N;/*found*/ for(i=0; iM; i+) len=strlen(ssi); if(i=0) *n=len;/*found*/ if(len *n) *n=len; k=i; /*found*/ return(k);二、程序改错题#include #include char* fun( char tt ) int i; for( i = 0; tti; i+ )/*found*/ if( a = tti )&( tti = z ) )/*found*/ tti-= 32; return( tt );main( ) char tt81; printf( nPlease enter a string: ); gets( tt ); printf( nThe result string is:n%s, fun( tt ) );第12套题一、程序填空题#include void fun(char *s) int i, j=0, k=0; char t180, t280; for(i=0; si!=0; i+) if(si=0 & si=9) /*found*/ t2j=si; j+; else t1k+=si; t2j=0; t1k=0;/*found*/ for(i=0; ik; i+) si=t1i;/*found*/ for(i=0; ij; i+) sk+i=t2i;main() char s80=def35adh3kjsdf7; printf(nThe original string is : %sn,s); fun(s); printf(nThe result is : %sn,s);二、程序改错题#include #include #define MAXLINE 20fun ( char *pstr6) int i, j ; char *p ; for (i = 0 ; i 5 ; i+ ) /*found*/ for (j = i + 1; j 0) p = *(pstr + i) ;/*found*/ *(pstr + i) = *(pstr + j ); *(pstr + j) = p ; 第13套题一、程序填空题#include void fun(char *s) int i, j, n; for(i=0; si!=0; i+)/*found*/ if(si=0 & sii; j-)/*found*/ sj+1= sj; sj+1=*; i=i+1; main() char s80=ba3a54cd23a; printf(nThe original string is : %sn,s); fun(s); printf(nThe result is : %sn,s);二、程序改错题#include double fun ( int m ) double y = 1.0 ; int i;/*found*/ for(i = 2 ; i = m ; i+)/*found*/ y += 1.0 / (i * i) ; return( y ) ;main( ) int n = 5 ; printf( nThe result is %lfn, fun ( n ) ) ;第14套题一、程序填空题#include void fun(char *s, int *t) int i, n; n=0;/*found*/ for(i=0; si!=0; i+)/*found*/ if(si=0&si= 9) n+;/*found*/ *t=n ;main() char s80=abcdef35adgh3kjsdf7; int t; printf(nThe original string is : %sn,s); fun(s,&t); printf(nThe result is : %dn,t);二、程序改错题#include int fun(int *x,int y) int t ;/*found*/ t =* x ;* x = y ;/*found*/ return(t) ;main() int a = 3, b = 8 ; printf(%d %dn, a, b) ; b = fun(&a, b) ; printf(%d %dn, a, b) ;第15套题一、程序填空题#include void fun(char *s) int i, n, k; char c; n=0; for(i=0; si!=0; i+) n+;/*found*/ if(n%2=0) k=n-1 ; else k=n-2;/*found*/ c=sk ; for(i=k-2; i=1; i=i-2) si+2=si;/*found*/ s1=c;main() char s80=abcdefgh; printf(nThe original string is : %sn,s); fun(s); printf(nThe result is : %sn,s);二、程序改错题#include long fun (int a, int n) int j ;/*found*/ long s = 0, t =0; for ( j = 0 ; j n ; j+) t = t * 10 + a ; s = t ; for ( j = 1 ; j n ; j+) /*found*/ t = t/10 ; s = s - t ; return(s) ;main( ) int a, n ; printf( nPlease enter a and n:) ; scanf( %d%d, &a, &n ) ; printf( The value of function is: %ldn, fun ( a, n ) );第16套题一、程序填空题#include void fun(char *s, char *p) int i, j, n, x, t; n=0; for(i=0; si!=0; i+) n+; for(i=1; in-2; i=i+2) /*found*/ t=i/*found*/ for(j=i+2 ; jsj) t=j; if(t!=i) x=si; si=st; st=x; for(i=1,j=0; in; i=i+2, j+)