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C program for swapping of two strings

Posted by: Instanceofjava Posted date: 12:05 AM / comment : 0 C language interview programs , c programming examples for beginners

C program for swapping of two strings.
C program to swap two strings without using library functions.
Now we will swap two strings without using library functions and by using arrays in java.
Now we will write a C program on how to swap two strings.

Program #1 Write a C program to swap two strings

#include <stdio.h>
#include <stdlib.h>
int main(int argc, char *argv[])
{
int i=0,j=0,k=0;
char str1[20],str2[20],temp[20];
puts("Enter first string");
gets(str1);
puts("Enter second string");
gets(str2);
printf("Before swapping the strings \n");
puts(str1);
puts(str2);
while(str1[i]!='\0'){
temp[j++]=str1[i++];
}
temp[j]='\0';
i=0,j=0;
while(str2[i]!='\0'){
str1[j++]=str2[i++];
}
str1[j]='\0';
i=0,j=0;
while(temp[i]!='\0'){
str2[j++]=temp[i++];
}
str2[j]='\0';
printf("After swapping the strings are\n");
puts(str1);
puts(str2);
getch();
}

Output:

Write a C program to swap two integer arrays

Posted by: Instanceofjava Posted date: 11:52 PM / comment : 0 C language interview programs , c programming examples for beginners

C program to interchange the elements of an array.
Now we will see how to swap two integer arrays in C programming by using third array.

Program #1: Write a C program to swap two integer arrays

#include <stdio.h>
#include <stdlib.h>
int main(int argc, char *argv[])
{
int a[5],b[5],c[5],i;
printf("Enter First array 5 elemnets \n");
for(i=0;i<5;i++)
scanf("%d",&a[i]);
printf("\nEnter Second array 5 elements\n");
for(i=0;i<5;i++)
scanf("%d",&b[i]);
printf("Arrays before swapping\n");
printf("First array \n");
for(i=0;i<5;i++){
printf("%d ",a[i]);
}
printf("\nSecond array\n");
for(i=0;i<5;i++){
printf("%d ",b[i]);
}
for(i=0;i<5;i++){
c[i]=a[i];
a[i]=b[i];
b[i]=c[i];
}
printf("\nArrays after swapping\n");
printf("First array elements \n");
for(i=0;i<5;i++){
printf("%d ",a[i]);
}
printf("\nSecond array elements \n");
for(i=0;i<5;i++){
printf("%d ",b[i]);
}
return 0;
}

Output:

C Program to swap two numbers without using third variable

Posted by: Instanceofjava Posted date: 11:29 PM / comment : 0 C language interview programs , c programming examples for beginners , c programming language

C program to swap two numbers without using third variable.
Yes we can swap two variables without using third variable.
We have four different ways to swap two numbers without using third variable.
Lets see an example C program on how to swap two numbers without using third variable and without using function.

Program #1: Write a simple C program to swap two numbers without using third variable

#include <stdio.h>
#include <stdlib.h>
int main(int argc, char *argv[])
{
int a,b;
printf("Please enter two integer numbers to swap\n");
scanf("%d%d",&a,&b);
printf("before swapping\n");
printf("a=%d\n",a);
printf("b=%d",b);
a=b+a;
b=a-b;
a=a-b;
printf("\nafter swapping\n");
printf("a=%d\n",a);
printf("b=%d",b);
getch();
}

Output:

Program #2: Write a simple C program to swap two numbers without using third variable

#include <stdio.h>
#include <stdlib.h>
int main(int argc, char *argv[])
{
int a,b;
printf("Please enter two integer numbers to swap\n");
scanf("%d%d",&a,&b);
printf("before swapping\n");
printf("a=%d\n",a);
printf("b=%d",b);
a=a+b-(b=a);
printf("\nafter swapping\n");
printf("a=%d\n",a);
printf("b=%d",b);
getch();
}

Output:

Please enter two integers numbers to swap
30
40
before swapping
a=30
b=40
after swapping
a=40
b=30

Program #3: Write a simple C program to swap two numbers without using third variable : call by value

#include <stdio.h>
#include <stdlib.h>
int main(int argc, char *argv[])
{
int a=12, b=13;
a=a^b;
b=a^b;
a=b^a;
printf("a=%d\n",a);
printf("b=%d",b);
getch();
}

Output:

a=13
b=12

Program #4: Write a simple C program to swap two numbers without using third variable : call by value

#include <stdio.h>
#include <stdlib.h>
int main(int argc, char *argv[])
{
int a=12, b=13;
a=b-~a-1;
b=a+~b+1;
a=a+~b+1;
printf("a=%d\n",a);
printf("b=%d",b);
return 0;
}

Output:

a=13
b=12

C program to swap two numbers without using third variable and using functions

Posted by: Instanceofjava Posted date: 10:59 PM / comment : 0 C language interview programs , c programming examples for beginners

C program to swap two numbers using functions temporary variable.
We can swap two numbers by using temporary variable.
Lets see an example C program to swap two numbers without using any function.
C program to swap two numbers using third variable

Program #1: Write a C program to swap two numbers using temporary variable without using any function and by using third variable.

#include <stdio.h>
#include <stdlib.h>
int main(int argc, char *argv[])
{
int a,b, temp;
printf("Please enter two integer number to swap\n");
scanf("%d%d",&a,&b);
printf("before swapping\n");
printf("a=%d\n",a);
printf("b=%d",b);
temp=a;
a=b;
b=temp;
printf("\nafter swapping\n");
printf("a=%d\n",a);
printf("b=%d",b);
return 0;
}

Output:

Program #2: Write a C program to swap two numbers using temporary variable with using function and using third variable.

C program to swap two numbers using functions call by value

#include <stdio.h>
#include <stdlib.h>
void swap(int a, int b);
int main(int argc, char *argv[])
{
int a,b;
printf("Please enter two integer numbers to swap\n");
scanf("%d%d",&a,&b);
printf("before swapping\n");
printf("a=%d\n",a);
printf("b=%d",b);
swap(a,b);
return
}
void swap(int a, int b){
int temp=a;
a=b;
b=temp;
printf("\nafter swapping\n");
printf("a=%d\n",a);
printf("b=%d",b);
}

Output:

Please enter two integer numbers to swap
10
20
before swapping
a=10
b=20
after swapping
a=20
b=10

C program to print patterns of numbers,alphabets and stars in a pyramid shape

Posted by: Instanceofjava Posted date: 11:21 PM / comment : 3 c programming examples for beginners , c programming language

We can print *'s in pyramid pattern using C programming language.
We can also print patterns of numbers and alphabets using C program.
Now Check below program that how to print pyramid pattern of * using C program using for loop.
C program to print patterns of numbers and stars in a pyramid shape

Program #1 : Write a C program to print pyramid pattern of numbers using for loop.

#include <stdio.h>
#include <stdlib.h>
int main(){
int i, j, rows;
printf("Enter number of rows: \n");
scanf("%d",&rows);
for(i=1; i<=rows; ++i)
{
for(j=1; j<=i; ++j)
{
printf("* ");
}
printf("\n");
}
getch();
}

Output:

Program #2 : Write a C program to print pyramid pattern of numbers using for loop.

#include <stdio.h>
#include <stdlib.h>
int main(){
int i, j, rows;
printf("Enter number of rows to print pyramid numbers pattern \n ");
scanf("%d",&rows);
for(i=1; i<=rows; ++i)
{
for(j=1; j<=i; ++j)
{
printf("%d ",j);
}
printf("\n");
}
return 0;
}

Output:

Enter number of rows to print pyramid numbers pattern
10
1
1 2
1 2 3
1 2 3 4
1 2 3 4 5
1 2 3 4 5 6
1 2 3 4 5 6 7
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8 9
1 2 3 4 5 6 7 8 9 10

Program #3 : Write a c program to print patterns of numbers and alphabets

#include <stdio.h>
#include <stdlib.h>
int main(){
int i, j;
char input, alphabet = 'A';
printf("Enter the uppercase character you want to print in last row: ");
scanf("%c",&input);
for(i=1; i <= (input-'A'+1); ++i)
{
for(j=1;j<=i;++j)
{
printf("%c", alphabet);
}
++alphabet;
printf("\n");
}
getch();
}

Output:

Enter the uppercase character you want to print in last row:
I
A
BB
CCC
DDDD
EEEEE
FFFFFF
GGGGGGG
HHHHHHHH
IIIIIIIII

C program to find leap year using conditional operator

Posted by: Instanceofjava Posted date: 11:00 PM / comment : 0 c programming examples for beginners , c programming language

We have already seen how to check leap year or not using C program here
Now we need to find out a leap year by using conditional operator using C programming language.
expression ? value1 : value2
if expression is true then it picks value1 else value2.
Let us see an example C program to check a year is leap year or not by using conditional operator.

Program #1: Write a C program to find leap year using conditional operator without using any function and loops.

#include <stdio.h>
#include <stdlib.h>
int main(){
int year;
printf("Enter a year to check if it is a leap year or not \n");
scanf("%d", &year);
(year%4==0 && year%100!=0) ? printf("Leap Year") :
(year%400 ==0 ) ? printf("Leap Year") : printf("not a leap year");
getch();
}

Output:

Enter a year to check if it is a leap year or not
2012
Leap Year

this program prompts the user to enter a year and then uses the conditional operator to check if the year is a leap year. The condition being checked is whether the year is evenly divisible by 4 and not divisible by 100, or if it is evenly divisible by 400. If the year is a leap year, the program will print "year is a leap year.", otherwise it will print "year is not a leap year."

The conditional operator is represented by the ? symbol. It takes three operands: a condition, an expression to execute if the condition is true, and an expression to execute if the condition is false.

In this example, the condition is (year % 4 == 0 && year % 100 != 0) || (year % 400 == 0), the first expression to execute if the condition is true is printf("%d is a leap year.\n", year) and the second expression if the condition is false is printf("%d is not a leap year.\n", year)

It's important to note that this program doesn't take into account the Julian calendar and leap year rules before the Gregorian calendar.

In summary, this is a simple C program that uses the conditional operator to check if a year is a leap year, by evaluating a condition that checks if the year is evenly divisible by 4 and not divisible by 100, or if it is evenly divisible by 400. The program uses the ternary operator to make the code more concise and readable.

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