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习题讲解

习题讲解. 1 . 1 int compare(a,b,m,n) int a[],b[],m,n; { int i,t; if(m>=n) t=n; // 选定循环次数 t else t=m; for(i=0;i<t&&a[i]==b[i];i++); // 比较,空语句 if (i==m&&i==n) return(0); // 相等 else if(i==m) return(-1); //b 表长 else if(i==n) return (1); //a 表长

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习题讲解

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  1. 习题讲解 1.1 int compare(a,b,m,n) int a[],b[],m,n; { int i,t; if(m>=n) t=n; // 选定循环次数t else t=m; for(i=0;i<t&&a[i]==b[i];i++); //比较,空语句 if (i==m&&i==n) return(0); //相等 else if(i==m) return(-1); //b表长 else if(i==n) return (1); //a表长 if(a[i]>b[i]) return(1); //a中一个相应字符大 else return(-1); //b中一个相应字符大 }

  2. 习题讲解 0 1 n-1 t 1.2 void invert(a,n) int a[],n; { int i,t,s; t=n/2; for(i=0;i<t;i++) { s=a[i]; a[i]=a[n-i-1]; a[n-i-1]=s; } }

  3. { if(a[i]==a[j]) {k=j; while(a[k]!=-32768) { a[k]=a[k+1]; k++; } n--; j--; } j++; } i++; } *p_n=n; } 习题讲解 1.3 #define MAXN 100 int a[MAXN]; int n; void de_r(a,p_n) int a[]; int *p_n; { int i,j,k,n; n=*p_n; a[n]=-32768; i=0; while(a[i]!=-32768) { j=i+1; while(a[j]!=-32768)

  4. 习题讲解1. 4 8x60+6x50+4x25+2x10+1 =((((8x60-50+6)x50-25+4)x25-10+2)x10-0+1)

  5. 习题讲解1. 4 #define MAXN 100 typedef struct node {float coef; int exp; }TERM; TERM poly[MAXN]; int ah,at; float poly_val(ah,at,x) int ah,at; float x; { int i,j; float s,t=1; s=poly[ah].coef; for(i=ah;i<at;i++) { for(j=poly[i+1].exp,t=1;j<poly[i].exp;j++) t*=x; s=s*t+poly[i+1].coep; } return(s); }

  6. 习题讲解1.5 #define MAXN 100 type struct {int coef; int exp; }TERM; TERM polya[MAXN],polyb[MAXN],poly[MAXN]; int ch,ct,sstart,an,bn,free; int append(); int poly_add(); int poly_multiply(polya,an,polyb, bn,p_ch,p_ct) TERM polya[],polyb[]; int an,bn,*p_ch,*p_ct;

  7. ah at bh bt sstart 习题讲解1.5 *p_ch *p_ct { int ah,at,bh,bt,i,j,k; ah=0; at=an-1; bh=bt=an; sstart=an+an*bn; i=0; while(i<bn) { j=0; while(j<an) {poly[j].coef=polyb[i].coef*polya[j].coef; poly[j].exp=polyb[i].exp+polya[j].exp; j++; }

  8. 习题讲解1.5 free=sstart; if(poly_add(ah,at,bh,bt,p_ch,p_ct)) return(1); k=*p_ch; while(k<=*p_ct) poly[k-an*bn]=poly[k++]; bt=k-an*bn-1; i++; } return(0); } ah at bh bt sstart *p_ch *p_ct

  9. 习题讲解1.6 #define MAXN 100 void printring(a,n,i,k) int a[MAXN],n,i,k; { int b[MAXN],j,l; for(j=0;j<n;j++) b[j]=0; i--; for(j=0;j<n;j++) { l=0; while(l<k) { i=(i+1)%n; if(b[i]!=1) l++;} printf(“%d ”,a[i]); b[i]=1; } }

  10. 习题讲解1.8 #define MAXN 100 int stack[MAXN]; int top1=-1,top2=MAXN; int push(x,i) int x,i; { if(i<1||i>2) return(-1); if(top2==top1+1) return(1); if(i==1) stack[++top1]=x; else stack[--top2]=x; return(0); }

  11. 习题讲解1.8 int pop(p_y,i) int *p_y,i; { if(i<1||i>2) return(-1); if(i==1) if(top1==-1) return(1); else *p_y=stack[top1--]; else if(top2=MAXN) return(-1); else *p_y=stack[top2++]; return(0); }

  12. 习题讲解1.9 #define N 100 int q[N]; int head=-1,tail=0; int en_queue2(x) int x; { if(tail==N) return(1); q[tail++]=x; return(0); } int de_queue2(p_y) int *p_y; { if(head==tail) return(1); *p_y=q[head++]; return(0); }

  13. 习题讲解1.10 abc*d/+efg^^+h+ ab+cd/*ef^gh+^+

  14. 习题讲解1.11 typedef struct node {char data; struct node *link; } NODE; NODE *head; int count(head) NODE *head; { int n=0; NODE *p; if(head==NULL) return(0); p=head; while(p->link!=NULL) { p=p->link; n++; } n++; return(n); }

  15. 习题讲解1.12 void reverse(p_head) NODE **p_head; { NODE *p,*q,*r; if(*p_head==NULL) return; p=NULL; q=*p_head; while(q!=NULL) { r=q->link; q->link=p; p=q; q=r; } *p_head=p; }

  16. 习题讲解1.13 void insert1(p_head,a,b) NODE **p_head; char a, b; { NODE *p,*q; q=(NODE *)malloc(sizeof(NODE)); q->data=a; q->link=NULL; if(*p_head==NULL) *p_head=q; else { p=*p_head;

  17. 习题讲解1.13 if(p->data==b){ *p_head=q; q->link=p; } else { while(p->link!=NULL&&p->link->data!=b) p=p->link; if(p->link->data==b) { q->link=p->link; p->link=q; } else p->link=q; } } }

  18. 习题讲解1.14 int delete1(p_head,a) NODE **p_head; char a; { NODE *p,*q: q=*p_head; if(q==NULL||q->link==NULL) return (1); if(q->link->data==a) { *p_head=q->link; free(q); return(0); }

  19. 习题讲解1.14 while(q->link!=NULL&&q->link->data!=a) { p=q; q=q->link; } if(q->link->data==a) { p->link=q->link; free(q); return(0); } else return(1); }

  20. typedef struct node {int data; struct node *link; }NODE; NODE *xh, *yh; NODE *merge_l(pxh,pyh) NODE **pxh,**pyh; { NODE *px, *py, *pz, *zh; zh=(NODE *)malloc(sizeof(NODE)); pz=zh; px=*pxh; py=*pyh; while(px&&py) { pz->link=px; pz=px; px=px->link; pz->link=py; pz=py; py=py->link; } pz->link=px?px:py; pz=zh; zh=zh->link; free(pz); *pxh=NULL; *pyh=NULL; return(zh); } 习题讲解1.15

  21. NODE *xh, *yh; NODE *merge_c_l(xh, yh) NODE *xh, *yh; { NODE *px, *py, *pz, *zh; if(xh==NULL) return(yh); if(yh==NULL) return(xh); zh=(NODE *)malloc(sizeof(NODE)); pz=zh; pz->data=-32768; px=xh; py=yh; while(px->data>=pz->data&& py->data>=pz->data) if(px->data<=py-data) { pz->link=px; pz=px; px=px->link; } else { pz->link=py; pz=py; py=py->link; } 习题讲解1.16

  22. while(px->data>=pz->data) { pz->link=px; pz=px; px=px->link; } while(py->data>=pz->data) { pz->link=pz; pz=py; py=py->link; } pz->link=zh->link; pz=zh; zh=zh->link; free(pz); return(zh); } 习题讲解1.16

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