ESC-18104/18105 Programming for Problem Solving
Name - Rahul Garg
CRN - 1915345
Branch - CSE C2
Submitted to - Ms. Goldendendeep kaur
- To print my name.
#include<stdio.h>
int main() {
puts("**************");
puts("Rahul Garg");
puts("$$$$$$$$$$$$$$$");
return 0;
}
- To print College address.
#include<stdio.h>
int main() {
printf("\n\t\t\tGuru Nanak Dev Engineering College,");
printf("\n\t\t\tGill Road,");
printf("\n\t\t\tLudhiana , Punjab\n\n")
return 0;
}
- Program to add two integers.
#include <stdio.h>
int main() {
int a,b;
printf("\nEnter the numbers....");
printf("\nA:");
scanf("%d",&a);
printf("\nB:");
scanf("%d",&b);
a=a+b;
printf("\n Sum of the number is %d \n",a);
return 0;
}
- Program to find quotient and remainder.
#include <stdio.h>
int main() {
int a,b,r,q;
printf("\nEnter the Dividend:");
scanf("%d",&a);
printf("\nEnter the divisor:");
scanf("%d",&b);
r=a%b;
q=a/b;
printf("\nRemainder: %d",r);
printf("\nQuotient: %d\n",q);
return 0;
}
- Program to swap two variables without 3rd variable.
#include <stdio.h>
int main() {
int a,b;
printf("\nEnter the value of A:");
scanf("%d",&a);
printf("\nEnter the value of B:");
scanf("%d",&b);
a = a + b;
b = a - b;
a = a - b;
printf("\nA: %d",a);
printf("\nB: %d\n",b);
return 0;
}
- Program to check even odd number.
#include<stdio.h>
int main() {
int num,temp;
printf("Enter the Number:");
scanf("%d",&num);
if(num%2==0)
printf("\nNumber is Even....");
else
printf("\nNumber is Odd....");
printf("\n\n");
return 0;
}
- Finding greteast of two numbers.
#include<stdio.h>
int main() {
int a,b;
printf("Enter any two number(A and B): ");
scanf("%d%d", &a, &b);
if(a>b)
printf("\nA is largest....\n");
else
printf("\nB is largest.....\n");
return 0;
}
- Find greatest of three number .
#include<stdio.h>
int main() {
int x, y, z, large;
printf(" Enter any three integer numbers for x, y, z : ") ;
scanf("%d %d %d", &x, &y, &z) ;
large = (x > y ? ( x > z ? x : z) : (y > z ? y : z)) ;
printf("\n\n Largest among 3 numbers : %d\n", large) ;
return 0;
}
- Program to assign grade to student according to percentage.
#include<stdio.h>
int main() {
int s1,s2,s3,s4,s5,agg;
float perc;
printf("Enter the Marks in 5 Subjects Respectively:\n");
scanf("%d%d%d%d%d",&s1,&s2,&s3,&s4,&s5);
agg=s1+s2+s3+s4+s5; // Aggregate Marks
perc=agg/500.0*100; // Perc Marks
if(perc>=90)
{
printf("\nA\n");
}
else if (perc>=80 && perc<90)
{
printf("\nB\n");
}
else if(perc>=70 && perc<80)
{
printf("\nC\n");
}
else if(perc>=60 && perc<70)
{
printf("\nD\n");
}
else if(perc>=50 && perc<60)
{
printf("\nE\n");
}
else
{
printf("\nScope of Improvement....\n");
}
return 0;
}
- Program to print roots of quadratic equation.
#include <stdio.h>
#include <math.h>
int main()
{
double a, b, c, discriminant, root1, root2, realPart, imaginaryPart;
printf("Enter coefficients a, b and c: ");
scanf("%lf %lf %lf",&a, &b, &c);
discriminant = b*b-4*a*c;
if (discriminant > 0)
{
root1 = (-b+sqrt(discriminant))/(2*a);
root2 = (-b-sqrt(discriminant))/(2*a);
printf("root1 = %.2lf and root2 = %.2lf",root1 , root2);
}
else if (discriminant == 0)
{
root1 = root2 = -b/(2*a);
printf("root1 = root2 = %.2lf;", root1);
}
else
{
realPart = -b/(2*a);
imaginaryPart = sqrt(-discriminant)/(2*a);
printf("root1 = %.2lf+%.2lfi and root2 = %.2f-%.2fi", realPart, imaginaryPart, realPart, imaginaryPart);
}
return 0;
}
- Program to check year is leap or not.
#include<stdio.h>
int main() {
int year,temp;
printf("Enter the year:");
scanf("%d",&year);
temp=year%4;
if(year%100==0)
{
if(year%400==0)
printf("\nLeap year...\n");
}
else
{
if(year%4==0)
printf("\nLeap year...\n");
else
printf("\nNot a Leap year...\n");
}
return 0;
}
- Program to print table of 6.
#include<stdio.h>
int main() { int res;
for(int i=1;i<=10;i++) {
res=5*i;
printf("\n5*%d=%d",i,res);
}
return 0;
}
- To make simple calculator using switch case.
#include <stdio.h>
int main() {
char Operator;
float num1, num2, result = 0;
printf("\n Please Enter an Operator (+, -, *, /) : ");
scanf("%c", &Operator);
printf("\n Please Enter the Values for two Operands: num1 and num2 : ");
scanf("%f%f", &num1, &num2);
switch(Operator)
{
case '+':
result = num1 + num2;
break;
case '-':
result = num1 - num2;
break;
case '*':
result = num1 * num2;
break;
case '/':
result = num1 / num2;
break;
default:
printf("\n You have enetered an Invalid Operator ");
}
printf("\n The result of %.2f %c %.2f = %.2f", num1, Operator, num2, result);
return 0;
}
- To calculate reverse of a number.
#include<stdio.h>
int main() {
int num,rev=0;
printf("\nEnter the Number:");
scanf("%ld",&num);
while(num!=0)
{
rev = rev * 10;
rev = rev + num%10;
num = num/10;
}
printf("\nReversed number:%d",rev);
printf("\n\n");
return 0;
}
- To check whether number is palindrome or not. /* Palindrome */
#include<stdio.h>
int main() {
int n,rev=0,check,rem;
printf("\nEnter the number:");
scanf("%d",&n);
check=n;
while( n!=0 )
{
rem = n%10;
rev = rev*10 + rem;
n /= 10;
}
if(rev==check)
printf("\nReversed number is equal to entered number....");
else
printf("\nReversed number is not equal to entered number....");
printf("\n\n");
return 0;
}
- To check whether a number is prime or not.
#include <stdio.h>
#include <stdlib.h>
int main() {
int num, j, flag;
printf("Enter a number \n");
scanf("%d", &num);
if (num <= 1)
{
printf("%d is not a prime numbers \n", num);
exit(1);
}
flag = 0;
for (j = 2; j <= num / 2; j++)
{
if ((num % j) == 0)
{
flag = 1;
break;
}
}
if (flag == 0)
printf("%d is a prime number \n", num);
else
printf("%d is not a prime number \n", num);
return 0;
}
- Program to print prime number to 100. /* Prime number from 1 to 100 */
#include<stdio.h>
int main(){
int numbr,k,remark;
printf(" The prime numbers between 1 and 100 : \n");
for(numbr=2;numbr<=100;++numbr)
{
remark=0;
for(k=2;k<=numbr/2;k++){
if((numbr % k) == 0){
remark++;
break;
}
}
if(remark==0)
printf("\n %d ",numbr);
}
return 0;
} 
- Program to check whether a number is armstrong or not.
#include <stdio.h>
int main()
{
int number, originalNumber, remainder, result = 0;
printf("Enter a three digit integer: ");
scanf("%d", &number);
originalNumber = number;
while (originalNumber != 0)
{
remainder = originalNumber%10;
result += remainder*remainder*remainder;
originalNumber /= 10;
}
if(result == number)
printf("%d is an Armstrong number.\n",number);
else
printf("%d is not an Armstrong number.\n",number);
return 0;
}
- Print Different Patterns. i) Pattern 1
#include <stdio.h>
int main() {
int i,j,r;
printf("Enter number of rows: ");
scanf("%d",&r);
for(i=1; i<=r; ++i)
{
for(j=1; j<=i; ++j)
{
printf("%d ",j);
}
printf("\n");
}
return 0;
}
ii) Pattern 2
#include <stdio.h>
int main() {
int r,i,j,num= 1;
printf("Enter number of rows: ");
scanf("%d",&r);
for(i=1;i<=r;i++)
{
for(j=1;j<=i;++j)
{
printf("%d",num);
++num;
}
printf("\n");
}
return 0;
}
- Program to find largest from 1 dimensional array.
#include <stdio.h>
int main() {
int i, n;
float arr[100];
printf("Enter total number of elements(1 to 100): ");
scanf("%d", &n);
printf("\n");
// Stores number entered by the user
for(i = 0; i < n; ++i)
{
printf("Enter Number %d: ", i+1);
scanf("%f", &arr[i]);
}
// Loop to store largest number to arr[0]
for(i = 1; i < n; ++i)
{
// Change < to > if you want to find the smallest element
if(arr[0] < arr[i])
arr[0] = arr[i];
}
printf("Largest element = %.2f", arr[0]);
return 0;
}
- To find sumof the N natural numbers in an array.
#include<stdio.h>
int main() {
int n, sum = 0, c, array[100];
printf("Enter the number of integers you want to add: ");
scanf("%d", &n);
printf("\n\nEnter %d integers \n\n", n);
for(c = 0; c < n; c++)
{
scanf("%d", &array[c]);
sum += array[c];
}
printf("\n\nSum = %d\n\n", sum);
return 0;
}
- Program to add two matrices .
#include <stdio.h>
int main() {
int m, n, c, d, first[10][10], second[10][10], sum[10][10];
printf("Enter the number of rows and columns of matrix\n");
scanf("%d%d", &m, &n);
printf("Enter the elements of first matrix\n");
for (c = 0; c < m; c++)
for (d = 0; d < n; d++)
scanf("%d", &first[c][d]);
printf("Enter the elements of second matrix\n");
for (c = 0; c < m; c++)
for (d = 0 ; d < n; d++)
scanf("%d", &second[c][d]);
printf("Sum of entered matrices:-\n");
for (c = 0; c < m; c++) {
for (d = 0 ; d < n; d++) {
sum[c][d] = first[c][d] + second[c][d];
printf("%d\t", sum[c][d]);
}
printf("\n");
}
return 0;
}
- Program to multiply two matrices .
#include <stdio.h>
int main()
{
int m, n, p, q, c, d, k, sum = 0;
int first[10][10], second[10][10], multiply[10][10];
printf("Enter number of rows and columns of first matrix\n");
scanf("%d%d", &m, &n);
printf("Enter elements of first matrix\n");
for (c = 0; c < m; c++)
for (d = 0; d < n; d++)
scanf("%d", &first[c][d]);
printf("Enter number of rows and columns of second matrix\n");
scanf("%d%d", &p, &q);
if (n != p)
printf("The matrices can't be multiplied with each other.\n");
else
{
printf("Enter elements of second matrix\n");
for (c=0;c<p;c++)
for (d = 0; d < q; d++)
scanf("%d", &second[c][d]);
for (c = 0; c < m; c++) {
for (d = 0; d < q; d++) {
for (k = 0; k < p; k++) {
sum = sum + first[c][k]*second[k][d];
}
multiply[c][d] = sum;
sum = 0;
}
}
printf("Product of the matrices:\n");
for (c = 0; c < m; c++) {
for (d = 0; d < q; d++)
printf("%d\t", multiply[c][d]);
printf("\n");
}
}
return 0;
}
- Program to check whether a string is palindrome or not .
#include <stdio.h>
#include <string.h>
int main(){
char string1[20];
int i, length;
int flag = 0;
printf("Enter a string:");
scanf("%s", string1);
length = strlen(string1);
for(i=0;i < length ;i++){
if(string1[i] != string1[length-i-1]){
flag = 1;
break;
}
}
if (flag) {
printf("%s is not a palindrome\n", string1);
}
else {
printf("%s is a palindrome\n", string1);
}
return 0;
}
- Program to perform basic operations like lenghth of string, string concat, string copy, string compare and string reverse.
#include <stdio.h>
#include <stdlib.h>
int find_length(char string[]) {
int len = 0, i;
for (i = 0; string[i] != '\0'; i++) {
len++;
}
return len;
}
void join_strings(char string1[], char string2[]) {
int i, len1, len2;
len1 = find_length(string1);
len2 = find_length(string2);
for (i = len1; i < len1 + len2; i++) {
string1[i] = string2[i - len1];
}
string1[i] = '\0'; //adding null character at the end of input
}
/*returns 0 if thery are same otherwise returns 1*/
int compare_strings(char string1[], char string2[]) {
int len1, len2, i, count = 0;
len1 = find_length(string1);
len2 = find_length(string2);
if (len1 != len2)
return 1;
for (i = 0; i < len1; i++) {
if (string1[i] == string2[i])
count++;
}
if (count == len1)
return 0;
return 1;
}
void copy_string(char destination[], char source[]) {
int len, i;
len = find_length(source);
for (i = 0; i < len; i++) {
destination[i] = source[i];
}
destination[i] = '\0';
}
int main() {
char string1[20], string2[20]; //string variables declaration with size 20
int choice;
while (1) {
printf("\n1. Find Length \n2. Concatenate \n3. Compare \n4. Copy \n5. Exit\n");
printf("Enter your choice: ");
scanf("%d", & choice);
switch (choice) {
case 1:
printf("Enter the string: ");
scanf("%s", string1);
printf("The length of string is %d", find_length(string1));
break;
case 2:
printf("Enter two strings: ");
scanf("%s%s", string1, string2);
join_strings(string1, string2);
printf("The concatenated string is %s", string1);
break;
case 3:
printf("Enter two strings: ");
scanf("%s%s", string1, string2);
if (compare_strings(string1, string2) == 0) {
printf("They are equal");
} else {
printf("They are not equal");
}
break;
case 4:
printf("Enter a string: ");
scanf("%s", string1);
printf("String1 = %s\n");
printf("After copying string1 to string 2\n");
copy_string(string2, string1);
printf("String2 = %s", string2);
break;
case 5:
exit(0);
}
}
return 0;
}
- Programs to swap two numbers using call by value and call by refernce. Call by reference
#include <stdio.h>
void swap(int*, int*);
int main() {
int x, y;
printf("Enter the value of x and y\n");
scanf("%d%d",&x,&y);
printf("Before Swapping\nx = %d\ny = %d\n", x, y);
swap(&x, &y);
printf("After Swapping\nx = %d\ny = %d\n", x, y);
return 0;
}
void swap(int *a, int *b)
{
int temp;
temp = *b;
*b = *a;
*a = temp;
}
call by value
#include <stdio.h>
void swap(int, int);
int main() {
int x, y;
printf("Enter the value of x and y\n");
scanf("%d%d",&x,&y);
printf("Before Swapping\nx = %d\ny = %d\n", x, y);
swap(x, y);
printf("After Swapping\nx = %d\ny = %d\n", x, y);
return 0;
}
void swap(int a, int b) {
int temp;
temp = b;
b = a;
a = temp;
printf("Values of a and b is %d %d\n",a,b);
}
- Program to calculate factorial of a number with and without recursion both. With Recursion
#include<stdio.h>
long int multiplyNumbers(int n);
int main() {
int n;
printf("Enter a positive integer: ");
scanf("%d", &n);
printf("Factorial of %d = %ld\n", n, multiplyNumbers(n));
return 0;
}
long int multiplyNumbers(int n)
{
if (n >= 1)
return n*multiplyNumbers(n-1);
else
return 1;
}
Without recursion:
#include <stdio.h>
int main() {
int c, n, fact = 1;
printf("Enter a number to calculate its factorial\n");
scanf("%d", &n);
for (c = 1; c <= n; c++)
fact = fact * c;
printf("Factorial of %d = %d\n", n, fact);
return 0;
}
- Program to print fibonacci series with and without recursion both. with recursion
#include<stdio.h>
void series(int);
int main() {
int n;
printf("\n\nEnter the number of terms you wish");
scanf("%d",&n);
printf("\n\n");
series(n);
printf("\n\n\n");
return 0;
}
void series(int n)
{
int t1=0,t2=1,next;
for(int i=0;i<=n;i++)
{
printf("%d\t",t1);
next=t1+t2;
t1=t2;
t2=next;
}
}
without recursion
#include<stdio.h>
int main()
{
int n1=0,n2=1,n3,i,number;
printf("Enter the number of elements:");
scanf("%d",&number);
printf("\n%d %d\n",n1,n2);
for(i=2;i<number;++i)
{
n3=n1+n2;
printf(" %d\n",n3);
n1=n2;
n2=n3;
}
return 0;
}
- Program to calculate average of 5 numbers using function.
#include<stdio.h>
int avg(int,int,int,int,int);
int main() { int a1,a2,a3,a4,a5,res;
printf("\nEnter the numbers respectiively: ");
scanf("%d%d%d%d%d",&a1,&a2,&a3,&a4,&a5);
res=avg(a1,a2,a3,a4,a5);
printf("Average of the numbers is %d\n",res);
return 0;
}
int avg(int a1,int a2,int a3,int a4,int a5)
{ int p;
p=(a1+a2+a3+a4+a5)/5;
return p;
}
Linear Search
#include <stdio.h>
int main()
{
int array[100], search, c, n;
printf("Enter number of elements in array\n");
scanf("%d", &n);
printf("Enter %d integer(s)\n", n);
for (c = 0; c < n; c++)
scanf("%d", &array[c]);
printf("Enter a number to search\n");
scanf("%d", &search);
for (c = 0; c < n; c++)
{
if (array[c] == search)
{
printf("%d is present at location %d.\n", search, c+1);
break;
}
}
if (c == n)
printf("%d isn't present in the array.\n", search);
return 0;
}
Binary Search
#include <stdio.h>
int main()
{
int c, first, last, middle, n, search, array[100];
printf("Enter number of elements\n");
scanf("%d",&n);
printf("Enter %d integers\n", n);
for (c = 0; c < n; c++)
scanf("%d",&array[c]);
printf("Enter value to find\n");
scanf("%d", &search);
first = 0;
last = n - 1;
middle = (first+last)/2;
while (first <= last) {
if (array[middle] < search)
first = middle + 1;
else if (array[middle] == search) {
printf("%d found at location %d.\n", search, middle+1);
break;
}
else
last = middle - 1;
middle = (first + last)/2;
}
if (first > last)
printf("Not found! %d isn't present in the list.\n", search);
return 0;
}
- Program to implement bubble sort.
#include <stdio.h>
int main()
{
int array[100], n, c, d, swap;
printf("Enter number of elements\n");
scanf("%d", &n);
printf("Enter %d integers\n", n);
for (c = 0; c < n; c++)
scanf("%d", &array[c]);
for (c = 0 ; c < n - 1; c++)
{
for (d = 0 ; d < n - c - 1; d++)
{
if (array[d] > array[d+1])
{
swap = array[d];
array[d] = array[d+1];
array[d+1] = swap;
}
}
}
printf("Sorted list in ascending order:\n");
for (c = 0; c < n; c++)
printf("%d\n", array[c]);
return 0;
}
{
int i;
printf("Enter information of students:\n");
for(i=0; i<3; ++i)
{
s[i].roll = i+1;
printf("\nFor roll number%d,\n",s[i].roll);
printf("Enter name: ");
scanf("%s",s[i].name);
printf("Enter marks: ");
scanf("%f",&s[i].marks);
printf("\n");
}
printf("Displaying Information:\n\n");
for(i=0; i<3; ++i)
{
printf("\nRoll number: %d\n",i+1);
printf("Name: ");
puts(s[i].name);
printf("Marks: %.1f",s[i].marks);
printf("\n");
}
return 0;
}
- Programs to compute the transpose of a matrix.
#include <stdio.h>
int main()
{
int a[10][10], transpose[10][10], r, c, i, j;
printf("Enter rows and columns of matrix: ");
scanf("%d %d", &r, &c);
printf("\nEnter elements of matrix:\n");
for(i=0; i<r; ++i)
for(j=0; j<c; ++j)
{
printf("Enter element a%d%d: ",i+1, j+1);
scanf("%d", &a[i][j]);
}
printf("\nEntered Matrix: \n");
for(i=0; i<r; ++i)
for(j=0; j<c; ++j)
{
printf("%d ", a[i][j]);
if (j == c-1)
printf("\n\n");
}
for(i=0; i<r; ++i)
for(j=0; j<c; ++j)
{
transpose[j][i] = a[i][j];
}
printf("\nTranspose of Matrix:\n");
for(i=0; i<c; ++i)
for(j=0; j<r; ++j)
{
printf("%d ",transpose[i][j]);
if(j==r-1)
printf("\n\n");
}
return 0;
}
- Program to print the address of variable using pointer.
#include <stdio.h>
int main() {
int a;
int *pt;
a = 10;
pt = &a;
printf("\n[&a ]:Address of A = %p", &a);
return 0;
}
- Program to access array using pointer.
#include <stdio.h>
int main()
{
int data[5], i;
printf("Enter elements: ");
for(i = 0; i < 5; ++i)
scanf("%d", data + i);
printf("You entered: \n");
for(i = 0; i < 5; ++i)
printf("%d\n", *(data + i));
return 0;
}
