Are you a Computer science student or a C programmer?
Are you also seeking C programming assignment help?
If so, then these secrets will help you a lot in completing your projects and assignments easily.
The experts of Global Assignment Help have discovered these secrets after a lot of research on different areas of C. All these secrets are based on real-time use cases that will help you understand the concepts of C easily.
OK!!! So, let’s have a look into these 7 secrets...
Simply write a function Add() that will return a sum of two integers. Here the Bitwise operation can be used to perform the addition operation. Go through the following code to see how:
int Add(int x, int y)
{
if (y == 0)
return x;
else
return Add( x ^ y, (x & y) << 1);
}
For this atexit() API is used. The function pointed by atexit() is automatically called without arguments when the program terminates normally. See the below example:
#include
#include
void ABC(void)
{
printf("Goodbye ABC!\n");
}
void XYZ(void)
{
printf("Goodbye XYZ!\n");
}
int main(int argc, wchar_t* argv[])
{
atexit(XYZ);
atexit(ABC);
return 0;
}
OK! So, now we can see that ABC and XYZ haven’t been called but are registered to be called when the program is terminated.
A sizeof operator is used in such case to compute the size of any of the object. This operator is used in two forms.
1.To get the object’s size that can be a variable, array, integer
2.To get the size of a type name like int, double, structure, pointer, etc
For Example:
#define NUM_OF(x) (sizeof (x) / sizeof (*x))
int _tmain(){
int number[10] = {1,1,1,1,1,1};
char *teststr[20] = {"","","","","","","","",""};
printf("Size of number[10] is %d\n", num(number));
printf("Size of teststr[20] is %d\n", num(teststr));
}
OUTPUT:
Size of a number[10] is 10
Size of teststr[20] is 20
Press any key to continue . . .
Now you can simply swap two variables without using the arithmetic operators. All you have to do is use XOR operator. Go through the following example to know how:
a = a ^ b;
b = a ^ b;
a = a ^ b;
// OR
a = a + b –(b=a);
// OR
a ^= b ^= a ^= b;
Most of the students tend to do this mistake that is they usually get confused between array and pointers.
To get this concept more clear, let’s have a look at the following example:
// Program to show that array and pointers are different -
#include
int main()
{
int arr[] = {10, 20, 30, 40, 50, 60};
int *ptr = arr;
// sizof(int) * (number of element in arr[]) is printed
printf("Size of arr[] %d\n", sizeof(arr));
// sizeof a pointer is printed which is same for all type
// of pointers (char *, void *, etc)
printf("Size of ptr %d", sizeof(ptr));
return 0;
}
OUTPUT:
Size of arr[] 24
Size of ptr[] 8
Students usually get confused between ‘=’ operator and ‘==’ operator. So, to resolve this issue our experts have suggested to use the defensive programming approach that is:
Use ‘0==x’ instead of using ‘x==0’
Doing so will help you to solve the problem as the compiler will always flag an error for the miswritten that is x==0.
For Example: Suppose, you have written
if ( 0==x )
NOTE: The compiler will definitely show an error and refuse to compile the program
In the C programming, -> it is not an operator. In fact, this operator is formed by combining two main operators that are ‘--’ and ‘>’.
To understand it better go through the following example:
int _tmain()
{
int x = 10;
while( x --> 0 ) // x goes to 0
{
printf("%d ", x);
}
printf("\n");
}
Here the conditional code decrements ‘X’ while returning to X’s original (not decremented) value, and then it compares the original value with ‘0’ using the ‘>’ operator.
OUTPUT:
9 8 7 6 5 4 3 2 1 0
Press any key to continue...
Bonus Tip: You can even log off your computer using C programming
#include
int main()
{
System(“shutdown -l -f -t 00”);
}
So, these are the 7 unknown secrets of the C language that every programmer should know while doing programming assignments. These secrets are not only restricted to C language, you can also apply these tips for completing different programming assignments like java assignment, C++ assignment, etc.
In case of any query, you can easily reach our experts to avail C programming assignment help.
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