What does the following C function compute? Discover.
int some fun(int n)
{
if(n%2 == 0)
return 2;
int d, s = sqrt(n);
for(d = 3; d <= s; d = d+2)
if(n%d == 0)
return d;
return n;
}
The given C function some_fun takes an integer n as input and returns an integer as output.
If n is an even number, the function immediately returns the value 2. This ___ _____ ________ ______ _______ ________ ________ ___ _________ ______.
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_______ ________ __________ ________ __________ _____ ______.
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_________ _________ ____ ____ ______ _________ _________.
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_____ ______ ______ __________ ____ ___ _______ _____ _______.
____ ___ _________ _____ _______ _________ ________ _______ ________.
____ __________ ______ ___ ___ ________ _________ ____ _____ _________ _____.
___ _________ _________ _______ _________ _________ _____ _________ _______ _____ ___.
____ ________ ______ ______ _________.
____ ________ _______ ____ ___ _____ ________ __________ _______ ___.
____ _______ _____ _________ ________.
_________ ________ ___ ___ _______ ________.
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What is wrong with the following declaration? Explain. float *number = 2.30;
Write the output of the following C codes, with proper justification for each.
i) main()
{
int i = 5, j = 6, k = 7;
printf("%d", i++ - ++j + ++k);
}
ii) main()
{
char day[10] = "SUNDAY";
day[0] = 77;
day[1] = 79;
printf("%s", day);
}
iii) main()
{
int i = 3;
while(i--)
{
int i = 1;
printf("%d ", i);
i++;
}
}
iv) int f(int n)
{
if(n < 1)
return n;
else
return n*n + f(n-1);
}
main()
{
printf("%d", f(5));
}
v) struct employee
{
char name[20];
int id;
long salary;
}emp = {"Piyush", 1, 50000};
main()
{
printf("Name = %s ", emp.name);
printf("ID =%d", emp.id);
printf("Salary = %d", emp.salary);
}
What is a pointer variable to a pointer? Where is it used? explain with an example
Convert the following nested do-while loop into a nested for loop:
i = 0;
do
{
i = i+1;
j = i;
do
{
if( (i+j)%2 == 0 )
printf("%d", i);
else
printf("%d", j);
j = j+2;
}while(j < = 10);
}while(i <= 5);
Verify that you get the same output in each case.
Given any two real matrices A and B with same dimensions, define the matrix AB to be the matrix with ijth entry as if aij 6= 0 and 0 otherwise. Write a program that reads two matrices A and B from the keyboard and prints the matrix AB. The program must float an error message if the dimensions of A and B mismatch.
Explain the meaning of the terms garbage collection, fragmentation, relocation and compaction
Based on Example 5 in Unit 12, write functions to add and multiply polynomials of real variables.