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C programs QnA

Q. If sum of two integer is 14 and if one of them is 8 then find other integer. Ans: Well, this is very simple. Simply, one integer is 8 and sum of two integers is 14. So, we need to subtract the number 8 from their sum of 14 to get the second number. So, the second number is: 14 - 8 = 6 C-Program of this task Code---> #include<stdio.h> int main () { int num1 = 8 , num2 , sum = 14 ; num2 = sum - num1 ; printf ( "The second number is: %d" , num2 ); return 0 ; }
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Swap two variables without using third variable



In this C-program we will take two integers(decimal number) as input from user and print the swapped values of the integers.

input:

Two numbers(i.e : 5,6,3 etc.)

output:

Swapped values of the two integers

CODE---->


#include<stdio.h>
int main() 
{
 int a,b;
 printf("Enter 1st number: "); 
 scanf("%d",&a); 
 printf("Enter 2nd number: "); 
 scanf("%d",&b); 
 a=a+b; /* we can also use: a=a*b */
 b=a-b; /* we can also use: b=a/b */
 a=a-b; /* we can also use: a=a/b */ 
 printf("After swapping the 1st number is = %d\n",a); 
 printf("After swapping the 2nd number is = %d",b); 
 return 0;
}
Download the C-Program file of this Program.

Don't just read, run on your pc !!!


RESULT :

Enter 1st number: 45
Enter 2nd number: 78
After swapping the 1st number is = 78
After swapping the 2nd number is = 45
--------------------------------
Process exited after 4.279 seconds with return value 0
Press any key to continue . . .


Images for better understanding :

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