helllo sir ,
what is the main use of the pointer ,array ,and the
structure with the example of a programe
Answer Posted / fazlur rahaman naik
With the help of pointer we can access a variable
address.with that we can change the value of the
variable.for eg:
main()
{
int a = 10;
int *x;
x = &a;
printf("a = %d\n",a);
*x = 978;
printf("a = %d\n");
}
now the value of the a is 978.
if we pass a pointer to a variable to a function then the
value of that variable will be chageed if we change it in
that function.
for eg:
main()
{
int b = 87;
int *x;
x = &b;
fun(x);
printf("b = %d\n");
}
fun(int *x)
{
*x = 879;
}
here the value of the b will be 879.
Array : Array is a collection of variable of similar types.
i.e. it can b an collection of n number of integers or arry
of characters etc.
for eg:
Take a examination marks of a class.it could b a float
value or a integer value.Then u need to take five variables
of float type or interger type.Insted of that u can take an
array of float or integer type.
float marks[n];
arrays r mainly used for strings.
char string[n];
Structure:
The structure is a collection of variables of various data
types.
the best example for this is employee details or student
details.
struct emloyee
{
char name[25];
int age;
float salary;
char mobile[15];
char desig[25];
};
Is This Answer Correct ? | 3 Yes | 0 No |
Post New Answer View All Answers
What is the explanation for cyclic nature of data types in c?
What is int main () in c?
What is the difference between exit() and _exit() function?
What are void pointers in c?
How do you list a file’s date and time?
Which type of language is c?
What are the features of c language?
If I have a char * variable pointing to the name of a function ..
Explain data types & how many data types supported by c?
How is a macro different from a function?
What are integer variable, floating-point variable and character variable?
What is the difference between int main and void main?
What is a double c?
What is variable initialization and why is it important?
What are the valid places to have keyword “break”?