C Programming - Pointers - Discussion
Discussion Forum : Pointers - True / False Questions (Q.No. 3)
3.
The following program reports an error on compilation.
#include<stdio.h>
int main()
{
float i=10, *j;
void *k;
k=&i;
j=k;
printf("%f\n", *j);
return 0;
}
Answer: Option
Explanation:
This program will NOT report any error. (Tested in Turbo C under DOS and GCC under Linux)
The output: 10.000000
The output: 10.000000
Discussion:
23 comments Page 3 of 3.
Mohammad said:
8 years ago
In code blocks on windows 7.
Error: invalid conversion from 'void*' to 'float*' [-fpermissive].
Error: invalid conversion from 'void*' to 'float*' [-fpermissive].
Rashmi said:
5 years ago
Before assigning a void pointer => void *k, typecasting has to be done => (int*)k or *((int*)k).
KRISH BHANDERI said:
2 years ago
@All.
Here is my code;
#include<stdio.h>
int main()
{
float i=10, *j;
void *k;
k=&i;
j=k;
printf("%f\n", *j);
return 0;
}
in the Above program, void pointer holds the Address of Float i
Remember Whenever we use a void pointer we have to typecast it to print the value
printf("%d",*(float*)k);
But here what we done is we assigned the address of i which is hold by k
j=k
now j holds the address of i
So, it will print 10.000000.
Here is my code;
#include<stdio.h>
int main()
{
float i=10, *j;
void *k;
k=&i;
j=k;
printf("%f\n", *j);
return 0;
}
in the Above program, void pointer holds the Address of Float i
Remember Whenever we use a void pointer we have to typecast it to print the value
printf("%d",*(float*)k);
But here what we done is we assigned the address of i which is hold by k
j=k
now j holds the address of i
So, it will print 10.000000.
Post your comments here:
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