what is the difference between %d and %*d in c languaga?
- 7 Answers
- 20128 Views
- TCS, I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / sivakumar
anand and manini your expectations are wrong. because %d
give the original value of the variable and %*d give the
address of the variable.
eg:-
int a=10,b=20;
printf("%d%d",a,b);
printf("%*d%*d",a,b);
result is 10 20 1775 1775
here 1775 is the starting address of the memory allocation
for the integer.a and b having same address because of
contagious memory allocation.
| Is This Answer Correct ? | 35 Yes | 19 No |
Answer / azad sable,chiplun.
In first case i.e. '%d' the '%' indicates that the
conversion specification follows. And 'd' known as data
type charactor indicates that the no. to be read is in
intiger mode.
* is an input field which specifie field width.
example
scanf("%d%*d%d",&a,&b);
will assign the data 123 456 789 as follows.123 to a 456
skipp because of * 789 to b.
| Is This Answer Correct ? | 9 Yes | 5 No |
Answer / vishal pandey
int v=23,d=89;
printf("%d %*d",v,d);
then o/p v=23 and d=address value and address value change with processor but original value does not change.
| Is This Answer Correct ? | 3 Yes | 2 No |
Answer / shivam chaurasia
The %*d in a printf allows you to use a variable to control the field width, along the lines of:
int wid = 4;
printf ("%*d
", wid, 42);
output,...
..42
if the form is like this...
printf ("%*d %*d
", a, b);
is undefined behaviour as per the standard, since you should be providing four arguments after the format string, not two (and good compilers like gcc will tell you about this if you bump up the warning level). From C11 7.20.6 Formatted input/output functions:
If there are insufficient arguments for the format, the behavior is undefined.
It should be something like:
printf ("%*d %*d
", 4, a, 4, b);
check this link for extra detail....
http://www.cplusplus.com/reference/cstdio/printf/
| Is This Answer Correct ? | 1 Yes | 0 No |
How is a structure member accessed?
Is it possible to initialize a variable at the time it was declared?
write the function int countchtr(char string[],int ch);which returns the number of timesthe character ch appears in the string. for example the call countchtr("she lives in Newyork",'e') would return 3.
Write a function that will take in a phone number and output all possible alphabetical combinations
write a c program to find largest number in matrix(in each row,each column, diagonally, and in the whole matrix)? Its urgent.
9.how do you write a function that takes a variable number of arguments? What is the prototype of printf () function? 10.How do you access command-line arguments? 11.what does ‘#include<stdio.h>’ mean? 12.what is the difference between #include<> and #include”…”? 13.what are # pragma staments? 14.what is the most appropriate way to write a multi-statement macro?
can u suggest me am in a confusion to choose whether to go to c programming or a software testing . am a graduate in B.sc(electronics).
Where in memory are my variables stored?
what are the various memory handling mechanisms in C ?
main() { int a[3][4] ={1,2,3,4,5,6,7,8,9,10,11,12} ; int i, j , k=99 ; for(i=0;i<3;i++) for(j=0;j<4;j++) if(a[i][j] < k) k = a[i][j]; printf("%d", k); }
4 Answers Vector, Wipro, Zoho,
Function to find the given number is a power of 2 or not?
A SIMPLE PROGRAM OF GRAPHICS AND THEIR OUTPUT I WANT SEE WAHAT OUTOUT OF GRAPHICS PROGRAM
C 
