Create an array that can store marks of 20 students
Create an array that can store names of 100 student
pls tell fast
Answers
Answer:
. Write array declarations for the following:
a. Scores of 100 students : int score[100];
b. English letters : char a[10];
c. A list of 10 years : int year[12];
d. A list of 30 real numbers : float n[30];
2. Write array initialization statements for the following:
a. An array of 10 scores: 89, 75, 82, 93, 78, 95, 81, 88, 77,and 82
Ans: int score[10] = {89, 75, 82, 93, 78, 95, 81, 88, 77, 82};
b. A list of five amounts: 10.62, 13.98, 18.45, 12.68, and 14.76
Ans: float amt[5] = { 10.62, 13.98, 18.45, 12.68, 14.76 };
c. A list of 100 interest rates, with the first six rates being 6.29, 6.95,
7.25, 7.35, 7.40 and 7.42.
Ans: float rate[100] = { 6.29, 6.95, 7.25, 7.35, 7.40, 7.42};
d. An array of 10 marks with value 0.
Ans: int mark[10]={NULL}; or int mark[10]={0,0,0,0,0,0,0,0,0,0};
e. An array with the letters of VIBGYOR.
Ans: char c[7]={'V','I','B','G','Y','O','R'};
f. An array with number of days in each month.
Ans: int days[12]={31,28,31,30,31,30,31,31,30,31,30,31};
3. Write a C++ code to input values into the array: int ar[50];
int i , ar[50];
for (i=0;i<50;i++)
{
cout << ”Enter value”;
cin << ar[i];
}
4. Write a C++ code fragment to display the elements in the even positions of the array
float val[100];
int i;
float val[100];
for (i = 0; i <100; i += 2)
{
cout << ”Enter value”;
cin << ar[i];
}
5. The elements of an array with ten elements are numbered from ____ to ____.
Ans. 0 to 9
6. An array element is accessed using _____.
Ans. Index value
7. If AR is an array, which element will be referenced using AR[7]?
Ans. Element at the position 8.
8. Consider the array declaration int a[3]={2,3,4}; What is the value of a[1]?
Ans. 3
9. Consider the array declaration int a[]={1,2,4}; What is the value of a[1]?
Ans. 2
10. Printing all the elements of an array is an example for _____ operation.
Ans. Array traversal
11. What does the declaration int studlist[1000] mean?
studlist is an array which can hold 1000 integer values.
12. How is memory allocated for a single dimensional array?
The elements of a single dimensional array will store in continues memory locations according
to its data type
Eg. int n[5]; Here consider n[0] is in the memory location of address 1000. An integer data
need 2 bytes of memory. So n[1] will be at 1002, n[2] at 1004 and so on.
13. Read the following statements:
char name[20];
cin>>name;
cout<<name;
What will be the output if you input the string “Sachin Tendulkar”? Justify your answer.
Sachin. The letters of the word Sachin is stores in the array name as first 6 char elements.
The input is completed due to the blank space and the word Tendulkar is skipped.
14. Write C++ statements to accept two single dimensional arrays of equal length
and find the difference between corresponding elements.
#include<iostream>
using namespace std;
int main()
{
int n[10],m[10],i;
for (i=0;i<10;i++)
{
cout <<"Enter elements for First Array ";
cin>>n[i];
}
for (i=0;i<10;i++)
{
cout <<"Enter elements for Second Array ";
cin>>m[i];
}
for (i=0;i<10;i++)
{
if(n[i] |= m[i])
cout<<endl<<" At the possition "<< i+1<< " First Array
elementis :" << n[i]<<"and the Second Array Element is :"<<m[i]<<endl;
}
return 0;
}
15. Write a program to check whether a string is a palindrome or not.
#include<iostream>
#include <cstring>
using namespace std;
int main()
{
int n,i,flag=0 ;
char s[25];
cout <<"Enter the string for palindrome checking ";
cin>>s;
n=strlen(s);
for ( i = 0 ; i <= n/2 ; i++ )
{
If ( s[i] != s[ n-(i+1)] )
{
cout<<" The given string is not a palindrome " <<endl;
flag=1;
break;
}
}
if (flag==0)
cout <<"\nThe given string is a palindrome\n";
}
}
if (flag==0)
cout <<"\nThe given string is a palindrome\n";
return 0;
}
16. Write C++ statements to accept an array of 10 elements and display the count
of even and odd numbers in it.
#include<iostream>
using namespace std;
int main()
{
int i,r,even=0,odd=0,no[10];
for (i=0;i<10;i++)
{
{
cout<<"Enter no ";
cin>>no[i];
}
}
for (i=0;i<10;i++)
{
r=no[i]%2;
if(r==0)
even++;
else
odd++;
}
cout<<" \n No of even numbers among the given numbers :"<<even<<endl;
cout<<" \n No of even numbers among the given numbers :"<<odd<<endl;
return 0;
}
17. Write down the output of the following code segment:
puts(“hello”);
puts(“friends”);
output:
hello
friends
18. Write the initialisation statement to store the string "GCC".
Ans. char[3]={'G','C'.'C'};
19. Define an array?
Arrays are used to store a set of values of the same type in contiguous memory locations under
a single variable name. Each element in an array can be accessed using its position in the list,
called index number or subscript.
Eg. int a[10];