Lập trình C- Bài tập 11 doc

Câu 1. vi
t ct nh p m ng n ph n t s nguy
ên, d
m, tính t ng v
à li
t k
ê các s

nguyên t
trong m ng.
#include <iostream.h>

# include <math.h>

void main (){

int n,i,a[100],s=0,d=0;

cout<<"Nhap vao gia tri cua n :";

cin>>n;

for(i=0;i<n;i++){

cout<<"a["<<i<<"]= "; cin>>a[i];

}

cout<<"Cac so nguyen to co trong mang : "<<endl;

for(i=0;i<n;i++){

int k=2;

while(a[i]%k!=0&&k<=sqrt(a[i]))k++;

if(sqrt(a[i])<k){

d++;

s+=a[i];

cout<<"a["<<i<<"]="<<a[i
]<<endl;}}

if(d!=0){

cout<<"Co "<<d<<" so nguyen to trong mang ! "<<endl;

cout<<"Tong cac so nguyen to trong mang la : "<<s; }

else

cout<<"Ko co so nguyen to nao trong mang ! ";

}

Câu 2.
nhu trên s
chính ph
uong.

# include <iostream.h>

# include <math.h>

void main (){

int n,i,a[100],d=0,t=0;

cout<<"Nhap vao so phan tu cua mang : ";cin>>n;

cout<<"nhap mang : "<<endl;

for(i=0;i<n;i++){

cout<<"a["<<i<<"]= ";

cin>>a[i];

}

cout<<"Cac so chinh phuong trong mang : "<<endl;

for(i=0;i<n;i++){

int k=sqrt(a[i]);

if(k*k==a[i]){

d++;t+=a[i];

cout<<a[i]<<" ; ";

}
}
if(d>0){

cout<<"
\
nCo "<<d<<" so chinh phuong trong mang tren !

"<<endl;

cout<<"Tong S = "<<t;

}
else

cout<<"Khong co so chinh phuong nao trong mang tren
! ";

}

Câu 3. Vi
t ct nh p m ng n ph n t s nguy
ên, nh
p ph n t c n t
ìm ki
m M n u
tìm th

y thông báo s lu ng v
à v
trí c a nh ng ph n t t
ìm th
y ngu c l i thông
báo không tìm th
y
#include <iostream.h>

void main (){

int n,i,m,d=0,vt;

int a[100];
co
ut<<"Nhap vao gia tri cua n : ";

cin>>n;

for(i=0;i<n;i++){

cout<<"a["<<i<<"]= ";

cin>>a[i];

}
cout<<"Nhap vao phan tu M can tim kiem :";

cin>>m;

for(i=0;i<n;i++){

if(a[i]==m)d++;

}

if(d!=0){

cout<<"Co "<<d<<" phan tu "<<m
<<" trong mang vua nhap ! "<<endl;

cout<<"Vi tri xuat hien : ";

for(i=0;i<n;i++){

if(a[i]==m)

cout<<"a["<<i<<"]"<<" ; ";

}
}
else

cout<<"Khong xuat hien phan tu "<<m<<" trong mang vua nhap ! ";}

Câu 4. vi
t ct nh p m ng n ph n t in ra các s l theo th t tr tuy t d i tang d n,
các s
ch n theo th t tuy t d i gi m d n

# include <iostream.h>

#include <math.h>

void main (){

int a[100],i,n,j,tg;

cout<<"Nhap vao gia tri cua n : ";

cin>>n;

for(i=0;i<n;i++){

cout<<"a["<<i<<"]= "; cin>>a[i];

}
for(i=0;i<n
-
1;i++)

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

if(a[i]%2==0&&a[j]%2==0&&abs(a[i])<abs(a[j])){

tg=a[i];a[i]=a[j];a[j]=tg;

}
if(a[i]%2!=0&&a[j]%2!=0&&abs(a[i])>abs(a[j]))

{

tg=a[i];a[i]=a[j];a[j]=tg; }

}

cout<<"cac so le : "<<endl;

for(i=0;i<n;i++){

if(a[i]%2!=0)

cout<<a[i]<<" , ";

}

cout<<"
\
nCac so chan la : "<<endl;

for(i=0;i<n;i++){

if(a[i]%2==0)

cout<<a[i]<<" , ";

}
}

Câu 5. nh

p xâu ký t t b
àn phím d
m trong xâu ký t nào xu t hi
ên nhi
u nh t
#include <iostream.h>

#include <string.h>

void main (){

int a[256]={0},i=0,max=0;

char s[100];
cout<<"Nhap vao Xau : ";

cin.getline(s,100);

while(s[i]!='
\0
')a[s[i++]]++;

for(i=0;i<256;i++)


if(max<a[i])max=a[i];

for(i=0;i<256;i++)

if(max==a[i])

cout<<"'"<<(char)i<<"' ,";

cout<<endl<<"Xuat hien : "<<max<<" lan !";

}

Câu 6. nh
p xâu. In ra ký t d
ài nh
t trong xâu
#include <iostream.h
>
#include <string.h>

void main (){

char s[100];
cout<<"Nhap Xau :";

cin.getline(s,100);

int i=0,b,c,d=0,e,k;

do{

while(s[i]==' '&&s[i]!='
\
0')i++;

b=i;

while(s[i]!=' '&&s[i]!='
\
0')i++;

c=i;

if(d<c
-
b)d=c
-
b;

}

while(s[i]!='
\
0');
i=0;

do{

while(s[i]==' '&&s[i]!='
\
0')i++;

b=i;

while(s[i]!=' '&&s[i]!='

\
0')i++;

c=i;

e=c
-
b;

if(d==e){

for(k=b;k<c;k++)

cout<<s[k];

} cout<<endl;

}

while(s[
i]!='
\
0'); }

Câu 7. nh
p xâu chu n hóa xâu dó lo i b các d u cách th a trong xâu d
êm trong
xâu có bao nhiêu ký t

#include<iostream.h>

#include <string.h>

void main (){

char s[100],d[100];

int dau,cuoi,i,j=0,t=0;


cout<<"Nhap xau :";

cin.getline(s,100);

dau=0;

while(s[dau]==' ')dau++;

cuoi= strlen(s)
-
1;

while(s[cuoi]==' ')cuoi
;
cout<<"Xau chuan hoa :";

for(i=dau;i<=cuoi;i++){

if(!((s[i]==' ')&&(s[i+1]==' ')))
{

d[j]=s[i];

cout<<d[j];

if(d[j]==' ')t++;

j++;

}

}

cout<<"
\
nCo "<<t+1<<" tu trong xau tren !";

}
Câu 8. nh
p m ng n sinh vi
ên g
m các thông tin; t
ên gi
i tính, di m toán, lý , hóa.
In danh sách s
th t
các sv n
b

l i
theo th

t tang d n c a t ng di m.
# include<iostream.h>

# include<string.h>

struct sv{

char ten[30], gt[5];

float t,l,h;

}
a[70],tg;

void main(){

int n,i,j,d=0;

cout<<"Nhap so luong SV :";

cin>>n;

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

cin.ignore();

cout<<"SV thu "<<i<<" : "<<endl;

cout<<"Ho va Ten : "; cin.getline(a[i].ten,30);

cout<<"Gioi tinh : "; cin.getline(a[i].
gt,5);

cout<<"Diem toan : ";cin>>a[i].t;

cout<<"Diem ly : ";cin>>a[i].l;

cout<<"Diem hoa : ";cin>>a[i].h; }

float ti,tj;

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

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

ti=a[i].t+a[i].l+a[i].h;


tj=a[j].t+a[j].l+a[j].h;

if(ti>tj
){

tg=a[i];a[i]=a[j];a[j]=tg;}

}

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

if(!(strcmp(a[i].gt,"nu"))&&(a[i].t<4||a[i].l<4||a[i].h<4)) {

d++;

cout<<d<<" : "<<a[i].ten<<" :
"<<(ti=a[i].t+a[i].l+a[i].h)<<endl;

}

}

Câu 10. Vi
t ct tính giá tr c a da th c
n
n
n
n
nn
axaxaxaxp
1
1
1

)(
T i giá tr x b c n, giá tr x v
à các h
s c a da th c nh p t b
àn phím
.

# include <iostream.h>

void main (){

int a[100],i,n,x,p=0,t=1;

cout<<"Nhap vao gia tri cua n : ";

cin>>n;

cout<<"Nhap vao mang :
"<<endl;

for(i=0;i<n;i++){

cout<<"a["<<i<<"]= ";

cin>>a[i];

}
cout<<"Nhap vao gia tri cua X : ";

cin>>x;

for(i=0;i<n;i++){

p+=a[i]*t;

t*=x;
}

cout<<"Gia tri cua P("<<x<<")= "<<p; }

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