bài tập kiểm tra ôn thi cao học môn kỹ thuật lập trình

Trang 1

//Bai 1 ( Phan test Do thi)

#include <stdio.h>

#include <conio.h>

#include <string.h>

#include <stdlib.h>

int a[20][20],n,chuaxet[20];

FILE *f;

void ReadData(void){

int i,j,k=0;char *s,*s1;

f=fopen("dothi.in","r");

fgets(s,255,f);

n=atoi(s);

for (i=1;i<=n;i++) {

for (j=1;j<=n;j++) a[i][j]=0;

chuaxet[i]=1;}

for (i=1;i<=n;i++){

fgets(s,255,f);

for (j=0;j<=strlen(s);j++)

if (s[j]==' ' || s[j]=='\n' || s[j]=='\t' || s[j]=='\r' || s[j]=='\0') {if (k>0)

{s1[k]='\0';k=0;a[i][atoi(s1)]=1;}}

else s1[k++]=s[j];

}

fclose(f);

}

void DFS(int u){

int v;

fprintf(f,"%3d",u);

chuaxet[u]=0;

for (v=1;v<=n;v++)

if (a[u][v]==1 && chuaxet[v]) DFS(v);

}

void main(void){

int i;

clrscr();

ReadData();

f=fopen("ketqua.out","w");

for (i=1;i<=n;i++)

if (chuaxet[i]) DFS(i);

fclose(f);

printf("Da xong");

getch();

}

#include <stdio.h>

#include <conio.h>

#include <string.h>

#include <stdlib.h>

int a[20][20],n,chuaxet[20],solt=0,trace[20];

FILE *f;

int i,j;

f=fopen("F:\dothi.in","r");

fscanf(f,"%d",&n);

for (i=1;i<=n;i++) chuaxet[i]=1;

for (i=1;i<=n;i++){

for (j=1;j<=n;j++) fscanf(f,"%d",&a[i][j]);

}

fclose(f);

}

Trang 2

void DFS(int u){

int v;

fprintf(f,"%3d",u);

chuaxet[u]=0;

trace[u]=solt;

for (v=1;v<=n;v++)

if (a[u][v]==1 && chuaxet[v]) DFS(v); }

void WriteData(void){

int i,j;

f=fopen("F:\ketqua.out","w");

fprintf(f,"%d",solt);

for (i=1;i<=solt;i++){

fprintf(f,"%s","\n");

for (j=1;j<=n;j++)

if (trace[j]==i) fprintf(f,"%3d",j); }

fclose (f);

}

void main(void){

int i;

clrscr();

ReadData();

for (i=1;i<=n;i++)

if (chuaxet[i]) { solt++; DFS(i);}

WriteData();

printf("Da xong");

getch();

}

#include <stdio.h>

#include <conio.h>

#include <string.h>

#include <stdlib.h>

int a[20][20],n,chuaxet[20],s,t,truoc[20]; FILE *f;

int i,j;

f=fopen("F:\dothi3.in","r");

fscanf(f,"%d%d%d",&n,&s,&t);

for (i=1;i<=n;i++) {chuaxet[i]=1;truoc[i]=0;} for (i=1;i<=n;i++){

for (j=1;j<=n;j++) fscanf(f,"%d",&a[i][j]); }

fclose(f);

}

Trang 3

void DFS(int u){

int v;

//fprintf(f,"%3d",u);

chuaxet[u]=0;

for (v=1;v<=n;v++)

if (a[u][v]==1 && chuaxet[v]) {truoc[v]=u;DFS(v);}

}

int i,j;

f=fopen("F:\ketqua3.out","w");

if (truoc[t]==0) fprintf(f,"%s","Do thi khong lien thong");

else {

fprintf(f,"%3d",t);i=t;

while (truoc[i])

{fprintf(f,"%3d",truoc[i]);i=truoc[i];}

}

fclose (f);

}

void main(void){

clrscr();

ReadData();

DFS(s);

WriteData();

printf("Da xong");

getch();

}

#include <stdio.h>

#include <conio.h>

#include <string.h>

#include <stdlib.h>

struct DSCanh {

int Dau;

int Cuoi;};

int a[20][20],n,chuaxet[20],m,Socanh=0;

DSCanh canh[50],cay[50];

FILE *f;

int i,j;

fscanf(f,"%d%d",&n,&m);

for (i=1;i<=n;i++) {chuaxet[i]=1;

for (j=1;j<=n;j++) a[i][j]=0;}

for (i=1;i<=m;i++) fscanf(f,"%d%d",&canh[i].Dau,&canh[i].Cuoi); fclose(f);

for (i=1;i<=m;i++)

{a[canh[i].Dau][canh[i].Cuoi]=1;a[canh[i].Cuoi][canh[i].Dau]=1; }

}

void Cay_khung(int u){

int v;

chuaxet[u]=0;

for (v=1;v<=n;v++)

if (a[u][v]==1 && chuaxet[v])

{Socanh++;cay[Socanh].Dau=u;cay[Socanh].Cuoi=v;Cay_khung(v);} }

int i;

Trang 4

if (Socanh!=n-1) fprintf(f,"%s","Do thi khong lien thong"); else {fprintf(f,"%3d%3d",n,Socanh);

for (i=1;i<=Socanh;i++)

fprintf(f,"%s%3d%3d","\n",cay[i].Dau,cay[i].Cuoi);} fclose (f);

}

void main(void){

clrscr();

ReadData();

Cay_khung(1);

WriteData();

printf("Da xong");

getch();

}

#include <stdio.h>

#include <conio.h>

#include <string.h>

#include <stdlib.h>

int a[20][20],n,chuaxet[20],Sodinh=0,Solt=0,Soltcau;

FILE *f;

int i,j;

fscanf(f,"%d",&n);

for (i=1;i<=n;i++){

}

fclose(f);

}

void DFS(int u){

int v;

chuaxet[u]=0;

for (v=1;v<=n;v++)

}

int CanhCau(int i){

int j;

for (j=1;j<=n;j++) chuaxet[j]=1;

chuaxet[i]=0;

Soltcau=0;

for (j=1;j<=n;j++)

if (chuaxet[j]) {Soltcau++;DFS(j);}

if (Soltcau>Solt) return(1);

return(0);

}

void main(void){

int i;

clrscr();

ReadData();

for (i=1;i<=n;i++)

if (chuaxet[i]) {Solt++;DFS(i);}

fprintf(f,"\n");

for (i=1;i<=n;i++)

if (CanhCau(i)) {Sodinh++;fprintf(f,"\n%3d",i);}

rewind(f);

fprintf(f,"%d",Sodinh);

printf("Da xong");

getch();

}

Trang 5

#include <stdio.h>

#include <conio.h>

#include <string.h>

#include <stdlib.h>

int a[20][20],b[20][20],n,chuaxet[20],Socanh=0,Solt=0,Soltcanh; FILE *f;

int i,j;

fscanf(f,"%d",&n);

for (i=1;i<=n;i++){

for (j=1;j<=n;j++) fscanf(f,"%d",&b[i][j]);

}

fclose(f);

}

void DFS(int u){

int v;

chuaxet[u]=0;

for (v=1;v<=n;v++)

}

int CanhCau(int i,int j){

int u,v;

for (u=1;u<=n;u++) chuaxet[u]=1;

for (u=1;u<=n;u++)

for (v=1;v<=n;v++) a[u][v]=b[u][v];

a[i][j]=0;a[j][i]=0;

Soltcanh=0;

for (u=1;u<=n;u++)

if (chuaxet[u]) {Soltcanh++;DFS(u);}

if (Soltcanh>Solt) return(1);

return(0);

}

void main(void){

int i,j;

clrscr();

ReadData();

for (i=1;i<=n;i++)

for (j=1;j<=n;j++) a[i][j]=b[i][j];

for (i=1;i<=n;i++)

if (chuaxet[i]) {Solt++;DFS(i);}

fprintf(f,"\n");

for (i=1;i<=n-1;i++)

for (j=i+1;j<=n;j++)

if (b[i][j])

if (CanhCau(i,j)) {Socanh++;fprintf(f,"\n%3d%3d",i,j);} rewind(f);

fprintf(f,"%d",Socanh);

printf("Da xong");

getch();

}

#include <stdio.h>

#include <conio.h>

#include <string.h>

#include <stdlib.h>

int a[20][20],n,chuaxet[20],q[20];

FILE *f;

Trang 6

fgets(s,255,f);

n=atoi(s);

for (i=1;i<=n;i++) {

for (j=1;j<=n;j++) a[i][j]=0;

chuaxet[i]=1;}

for (i=1;i<=n;i++){

fgets(s,255,f);

{s1[k]='\0';k=0;a[i][atoi(s1)]=1;}}

else s1[k++]=s[j];

}

fclose(f);

}

void BFS(int u){

int s,v,dau,cuoi;

chuaxet[u]=0;

dau=1;cuoi=1;q[dau]=u;

while (dau<=cuoi){

v=q[dau];

fprintf(f,"%3d",v);

dau++;

for (s=1;s<=n;s++)

if (a[v][s] && chuaxet[s])

{q[++cuoi]=s;chuaxet[s]=0;}

}

void main(void){

int i;

clrscr();

ReadData();

for (i=1;i<=n;i++)

if (chuaxet[i]) BFS(i);

fclose(f);

printf("Da xong");

getch();

}

#include <stdio.h>

#include <conio.h>

#include <string.h>

#include <stdlib.h>

int a[20][20],n,chuaxet[20],q[20];

FILE *f;

fgets(s,255,f);

n=atoi(s);

for (i=1;i<=n;i++) {

for (j=1;j<=n;j++) a[i][j]=0;

chuaxet[i]=1;}

for (i=1;i<=n;i++){

fgets(s,255,f);

{s1[k]='\0';k=0;a[i][atoi(s1)]=1;}}

else s1[k++]=s[j];

}

Trang 7

fclose(f);

}

void BFS(int u){

int s,v,dau,cuoi;

chuaxet[u]=0;

while (dau<=cuoi){

v=q[dau];

fprintf(f,"%3d",v);

dau++;

for (s=1;s<=n;s++)

}

void main(void){

int i;

clrscr();

ReadData();

for (i=1;i<=n;i++)

if (chuaxet[i]) BFS(i);

fclose(f);

printf("Da xong");

getch();

}

#include <stdio.h>

#include <conio.h>

#include <string.h>

#include <stdlib.h>

int a[20][20],n,chuaxet[20],s,t,truoc[20],q[20];

FILE *f;

int i,j;

fscanf(f,"%d%d%d",&n,&s,&t);

for (i=1;i<=n;i++) {chuaxet[i]=1;truoc[i]=0;}

for (i=1;i<=n;i++){

}

fclose(f);

}

void BFS(int u){

int s,v,dau,cuoi;

chuaxet[u]=0;

while (dau<=cuoi){

v=q[dau];

fprintf(f,"%3d",v);

dau++;

for (s=1;s<=n;s++)

{q[++cuoi]=s;truoc[s]=v;chuaxet[s]=0;} }

}

int i,j;

if (truoc[t]==0) fprintf(f,"%s","Do thi khong lien thong"); else { fprintf(f,"%3d",t);i=t;

Trang 8

while (truoc[i])

{fprintf(f,"%3d",truoc[i]);i=truoc[i];}

}

fclose (f);

}

void main(void){

clrscr();

ReadData();

BFS(s);

WriteData();

printf("Da xong");

getch();

}

#include <stdio.h>

#include <conio.h>

#include <string.h>

#include <stdlib.h>

int a[20][20],n,chuaxet[20],Sodinh=0,Solt=0,Soltcau,q[20]; FILE *f;

int i,j;

fscanf(f,"%d",&n);

for (i=1;i<=n;i++){

}

fclose(f);

}

void BFS(int u){

int s,v,dau,cuoi;

chuaxet[u]=0;

while (dau<=cuoi){

v=q[dau];

dau++;

for (s=1;s<=n;s++)

}

int DinhCau(int i){

int j;

for (j=1;j<=n;j++) chuaxet[j]=1;

chuaxet[i]=0;

Soltcau=0;

for (j=1;j<=n;j++)

if (chuaxet[j]) {Soltcau++;BFS(j);}

if (Soltcau>Solt) return(1);

return(0);

}

void main(void){

int i;

clrscr();

ReadData();

for (i=1;i<=n;i++)

if (chuaxet[i]) {Solt++;

Trang 9

fprintf(f,"\n");

for (i=1;i<=n;i++)

if (DinhCau(i)) {Sodinh++;fprintf(f,"\n%3d",i);}

rewind(f);

fprintf(f,"%d",Sodinh);

printf("Da xong");

getch();

}

#include <stdio.h>

#include <conio.h>

#include <string.h>

#include <stdlib.h>

int a[20][20],b[20][20],n,chuaxet[20],Socanh=0, Solt=0,Soltcanh,q[20]; FILE *f;

int i,j;

fscanf(f,"%d",&n);

for (i=1;i<=n;i++){

for (j=1;j<=n;j++) fscanf(f,"%d",&b[i][j]);

}

fclose(f);

}

void BFS(int u){

int s,v,dau,cuoi;

chuaxet[u]=0;

while (dau<=cuoi){

v=q[dau];

dau++;

for (s=1;s<=n;s++)

}

int CanhCau(int i,int j){

int u,v;

for (u=1;u<=n;u++) chuaxet[u]=1;

for (u=1;u<=n;u++)

for (v=1;v<=n;v++) a[u][v]=b[u][v];

a[i][j]=0;a[j][i]=0;

Soltcanh=0;

for (u=1;u<=n;u++)

if (chuaxet[u]) {Soltcanh++;BFS(u);}

if (Soltcanh>Solt) return(1);

return(0);

}

void main(void){

int i,j;

clrscr();

ReadData();

for (i=1;i<=n;i++)

for (j=1;j<=n;j++) a[i][j]=b[i][j];

for (i=1;i<=n;i++)

if (chuaxet[i]) {Solt++;BFS(i);}

fprintf(f,"\n");

for (i=1;i<=n-1;i++)

Trang 10

for (j=i+1;j<=n;j++)

if (b[i][j])

if (CanhCau(i,j)) {Socanh++;fprintf(f,"\n%3d%3d",i,j);} rewind(f);

fprintf(f,"%d",Socanh);

printf("Da xong");

getch();

}

#include <stdio.h>

#include <conio.h>

#include <string.h>

#include <stdlib.h>

int a[20][20],n,chuaxet[20],d[20],truoc[20],bd,kt;

FILE *f;

int i,j;

fscanf(f,"%d%d%d",&n,&bd,&kt);

for (i=1;i<=n;i++){

chuaxet[i]=1;

}

fclose(f);

}

void Duong_di(int s){

int i,ok=1,min,vt;

d[s]=0;chuaxet[s]=0;

for (i=1;i<=n;i++)

if (chuaxet[i]) {d[i]=a[s][i];truoc[i]=s;}

while(ok){

min=32000;vt=-1;

for (i=1;i<=n;i++)

if (chuaxet[i])

if (d[i]<min && d[i]) {min=d[i];vt=i;}

if (vt==-1) ok=0;

else { chuaxet[vt]=0;

for (i=1;i<=n;i++)

if (chuaxet[i] && a[vt][i]!=0)

if (d[i]>d[vt]+a[vt][i] || d[i]==0) {d[i]=d[vt]+a[vt][i];truoc[i]=vt;}

}

int i,dd[20],dem;

if (d[kt]==0) {printf("Khong co duong di tu %d den %d",bd,kt);return;} i=kt;dem=1;dd[1]=i;

while (truoc[i]!=bd)

{dem++;dd[dem]=truoc[i];i=truoc[i];}

printf("Duong di tu %d den %d:\n%d",bd,kt,bd);

for (i=dem;i>=1;i ) printf(" >%d",dd[i]);

}

void main(void){

int i,j;

clrscr();

ReadData();

Duong_di(bd);

Trang 11

WriteData();

getch();

}

#include <stdio.h>

#include <conio.h>

#include <string.h>

#include <stdlib.h>

int a[20][20],n,chuaxet[20];

FILE *f;

int i,j;

fscanf(f,"%d",&n);

for (i=1;i<=n;i++){

chuaxet[i]=1;

}

fclose(f);

}

void DFS(int u){

int v;

chuaxet[u]=0;

for (v=1;v<=n;v++)

if (chuaxet[v] && a[u][v]) DFS(v);

}

int Lienthong(void){

int i;

DFS(1);

for (i=1;i<=n;i++)

if (chuaxet[i]) return(0);

return(1);

}

int Kt_Euler(void){

int i,s,j;

for (i=1;i<=n;i++) {

s=0;

for (j=1;j<=n;j++) s=s+a[i][j];

if (s%2==1) return(0);}

return(1);

}

void Chutrinh(int u){

int S[50],i,j,top,CE[50],dem=0,v;

top=1;

S[top]=u;

while (top>0){

v=S[top];

i=0;

for (j=1;j<=n;j++)

if (a[v][j]) {i=j;break;}

if (i>0){top=top+1;S[top]=i;a[v][i]=0;a[i][v]=0;}

else {top ;dem++;CE[dem]=v;}

}

for (i=dem;i>1;i ) printf("%d >",CE[i]);

printf("%d",CE[1]);

}

void main(void){

int i,j;

clrscr();

ReadData();

if (Lienthong()==0) printf("Do thi khong lien thong");

else if (Kt_Euler()==0) printf("Do thi lien thong nhung khong co chu trinh");

else Chutrinh(3);

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