Interested to Buy Any Domain ? << Click Here >> for more details...
Predict the Output:
int main()
{
int *p=(int *)2000;
scanf("%d",2000);
printf("%d",*p);
return 0;
}
if input is 20 ,what will be print
- 2 Answers
- 6314 Views
- I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / vadivelt
Result:
Ans1.It prints the input given
Ans2.Program Crashes
Why Ans1?
--
1.If the memory 2000 is not a system or read only location
and if it is not a address of other constant varible which
is assigned by the compiler, then the input is stored in
the location. And it will be fetched in the prinf()
statement using *p and ll be printed.
Why Ans2?
--
In this program the pointer *p, does not holds the address
of a variable for which memory is allocated(may be static
or dynamic).Instead blindly it holds the address 2000.
The address may contain.
1.System files(OS) or
2.It may be a location from read only memory.
So, when we are trying to get input value and store it in
the location 2000, using scanf(), it may try to overwrite
the data in system file location or read only memory.
So the program Ultimately has to crash.
| Is This Answer Correct ? | 7 Yes | 0 No |
main() { int i; i = abc(); printf("%d",i); } abc() { _AX = 1000; }
write a c-program to find gcd using recursive functions
main() { int c[ ]={2.8,3.4,4,6.7,5}; int j,*p=c,*q=c; for(j=0;j<5;j++) { printf(" %d ",*c); ++q; } for(j=0;j<5;j++){ printf(" %d ",*p); ++p; } }
main() { char * strA; char * strB = I am OK; memcpy( strA, strB, 6); } a. Runtime error. b. I am OK c. Compile error d. I am O
#include"math.h" void main() { printf("Hi everybody"); } if <stdio.h> will be included then this program will must compile, but as we know that when we include a header file in "" then any system defined function find its defination from all the directrives. So is this code of segment will compile? If no then why?
Which one is taking more time and why ? :/home/amaresh/Testing# cat time.c //#include <stdio.h> #define EOF -1 int main() { register int c; while ((c = getchar()) != EOF) { putchar(c); } return 0; } ------------------- WIth stdio.h:- :/home/amaresh/Testing# time ./time_header hi hi hru? hru? real 0 m4.202s user 0 m0.000s sys 0 m0.004s ------------------ Witout stdio.h and with #define EOF -1 =================== /home/amaresh/Testing# time ./time_EOF hi hi hru? hru? real 0 m4.805s user 0 m0.004s sys 0 m0.004s -- From above two case , why 2nd case is taking more time ?
How we print the table of 2 using for loop in c programing?
A program that will create a movie seat reservation. The program will display the summary seats and its status. The user will be ask what seat no. to be reserved, then it will go back again to the summary to display the updated seat status. If the seat no. is already reserved then it will prompt an error message. And also if the input seat no is out of range then it will also prompt an error message. The program is continuously running. Termination of the program will depends on how the programmer will apply. Sample output: Movie Seats Reservation Summary of Seats: Seat 1: Available Seat 2: Available Seat 3: Available Seat 4: Available Seat 5: Available Enter seat no. (Press 0 to terminate Or the assigned seat capacity) : 1 Movie Seats Reservation Summary of Seats: Seat 1: Reserve Seat 2: Available Seat 3: Available Seat 4: Available Seat 5: Available Enter seat no. (Press 0 to terminate Or the assigned seat capacity) : 6 The Seat no. is out of range! Movie Seats Reservation Summary of Seats: Seat 1: Reserve Seat 2: Available Seat 3: Available Seat 4: Available Seat 5: Available Enter seat no. (Press 0 to terminate Or the assigned seat capacity) : 1 The Seat no. is already reserved! Movie Seats Reservation Summary of Seats: Seat 1: Reserve Seat 2: Available Seat 3: Available Seat 4: Available Seat 5: Available Enter seat no. (Press 0 to terminate Or the assigned seat capacity) : 0 GoodBye... Thank You!!!
main ( ) { static char *s[ ] = {“black”, “white”, “yellow”, “violet”}; char **ptr[ ] = {s+3, s+2, s+1, s}, ***p; p = ptr; **++p; printf(“%s”,*--*++p + 3); }
main(){ unsigned int i; for(i=1;i>-2;i--) printf("c aptitude"); }
Ramesh’s basic salary is input through the keyboard. His dearness allowance is 40% of basic salary, and house rent allowance is 20% of basic salary. Write a program to calculate his gross salary.
What is the main difference between STRUCTURE and UNION?
C Code 
