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
Answer Posted / 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 |
Post New Answer View All Answers
write a simple calculator c program to perform addition, subtraction, mul and div.
why nlogn is the lower limit of any sort algorithm?
write a function to give demostrate the functionality of 3d in 1d. function prototye: change(int value,int indexX,int indexY,int indexZ, int [] 1dArray); value=what is the date; indexX=x-asix indexY=y-axis indexZ=z-axis and 1dArray=in which and where the value is stored??
could you please send the program code for multiplying sparse matrix in c????
What is the difference between proc means and proc tabulate ? explain with a simple example when you have to use means or tabulate?
write a program for area of circumference of shapes
How can I Create a C program in splitting set of characters to specific subsets. Example: INPUT SET OF CHARACTERS: Therefore, my dear brothers and sisters, stand firm. Let nothing move you. Always give yourselves fully to the work of the Lord, because you know that your labor in the Lord is not in vain. SPLIT INTO HOW MANY CHARACTERS PER SUBSETS: 10 OUTPUT: Therefore, my dear b rothers an d sisters, stand fir m. Let not hing move you. Alway s give you rselves fu lly to the work of t he Lord, b ecause you know that your labo r in the L ord is not in vain.
Given a spherical surface, write bump-mapping procedure to generate the bumpy surface of an orange
What is data _null_? ,Explain with code when u need to use it in data step programming ?
Cluster head selection in Wireless Sensor Network using C programming language.
Set up procedure for generating a wire frame display of a polyhedron with the hidden edges of the object drawn with dashed lines
#include
why do you use macros? Explain a situation where you had to incorporate macros in your proc report? use a simple instream data example with code ?
create a C-code that will display the total fare of a passenger of a taxi if the driver press enter,the timer will stop. Every 10 counts is 2 pesos. Initial value is 25.00
What is full form of PEPSI