18 Amazing programs in C.
1.) WAP to swap the value of three variable without using fourth variable.
// program to swap the value of three
variable with using fourth variable.
#include <conio.h>
#include <stdio.h>
int main()
{
int a, b, c, s;
printf("Enter the value of a,b,c:\n");
scanf("%d%d%d", &a, &b, &c);
s =a;
a =b;
b =c;
c =b;
printf("The value of a, b and c after inter
-change is \na = %d,\nb = %d,\nc = %d", a, b, c);
return 0;
}
Output:-
The value of a, b and c after interchange is
a = 95,
b = 3,
c = 8
2.) WAP to check the character is upper case or lower case.
// program to check the character is uppercase or lower case.
#include <stdio.h>
int main()
{
char ch;
printf("Enter the character lower as well upper case:\n");
scanf("%c", &ch);
if (ch >= 65 && ch <= 90)
{
printf("%c is the upper case character", ch);
}
else if (ch >= 97 && ch <= 122)
{
printf("%c is the lower case character", ch);
}
return 0;
}
Output:
Enter the character lower as well upper case:
Z
Z is the upper case character.
3.) WAP to check the triangle is an isosceles, equilateral, scalene according their side.
// Q3. PROGRAM TO CHECK THE TRIANGLE IS ISOSCELES,
EQUILATERAL, SCANLENE ACCORDING THIER SIDES.
#include <stdio.h>
#include <conio.h>
int main()
{
int s1, s2, s3;
printf("Enter the sides of the triangle :\n");
scanf("%d%d%d", &s1, &s2, &s3);
if ((s1 == s2 && s2 != s3) || (s2 == s3 && s3 != s1)
|| (s3 == s1 && s1 != s2))
{
printf("side of the triangle is %d, %d, %d is an
Isosceles Triangle\n", s1, s2, s3);
}
if (s1 == s2 && s2 == s3 && s3 == s1)
{
printf("side of the triangle is %d, %d, %d is an
Equilateral Triangle\n", s1, s2, s3);
}
if (s1 != s2 && s2 != s3 && s3 != s1)
{
printf("side of the triangle is %d, %d, %d is a
Scalene Triangle\n", s1, s2, s3);
}
return 0;
}
Output:
Enter the sides of the triangle :
7
8
6
side of the triangle is 7, 8, 6 is a Scalene Triangle.
4.)WAP to print the square of given range of numbers.
// Program to print the square of given range of numbers.
#include <stdio.h>
#include <conio.h>
#include <math.h>
int main()
{
int beg, end, i, sq;
printf("Enter the range you can
find the square of the number:\n");
scanf("%d%d", &beg, &end);
for (i = beg; i <= end; i++)
{
sq = pow(i, 2);
printf("square of %d is %d\n", i, sq);
}
return 0;
}
Output:
Enter the range you can find the square of the number:
5
10
square of 5 is 25
square of 6 is 36
square of 7 is 49
square of 8 is 64
square of 9 is 81
5.)WAP to print following outputs:
1 OR *****
22 ****
333 ***
4444 **
55555 *
/*Program to print
1
22
333
4444
55555*/
#include<stdio.h>
#include<conio.h>
int main()
{
int i, j;
for(i=1;i<=5;i++)
{
for(j=1;j<=i;j++)
{
printf("%d",i);
}
printf("\n");
}
return 0;
}
Output:-
1
2 2
3 3 3
4 4 4 4
5 5 5 5 5
#include<stdio.h>
#include<conio.h>
int main()
{
int i; int j;
for(i=5;i>0;i--)
{
for(j=5;j>5-i;j--)
{
printf("*");
}
printf("\n");
}
return 0;
}
Output:
*****
****
***
**
*
6.)WAP using switch-case statement for following options:
1.a) factorial of a number.
2.b)Prime or not
3.c)odd or even
4.d)exit
// program using switch case statement for following option:
// a) factorial of a number.
// b) prime or not
// c) Odd or Even
// d) exit
#include <stdio.h>
#include <conio.h>
#include <stdlib.h>
int main()
{
char ch;
int num, i;
while (1)
{
int fact =1;
printf("Enter the choice where a)
calculate the factorial of a number,
b) check the number is prime or not ,
c) odd or even ,d) exit :\n");
scanf(" %c", &ch);
switch (ch)
{
case 'a':
printf("Enter the number :\n");
scanf("%d", &num);
for (i = 1; i <= num; i++)
{
fact = fact * i;
}
printf("Factorial of %d! is %d\n", num, fact);
break;
case 'b':
printf("Enter the number:\n");
scanf("%d", &num);
i = 2;
while (i < num)
{
if (num % i == 0)
{
printf("%d is not a prime\n", num);
break;
}
i += 1;
}
if (i == num)
{
printf("%d is a prime\n", num);
}
break;
case 'c':
printf("Enter the number:\n");
scanf("%d", &num);
if (num % 2 == 0)
{
printf("%d is an Even Number\n", num);
}
else
{
printf("%d is an Odd Number\n", num);
}
break;
case 'd':
exit(0);
default:
printf("Invalid choice!\a\n");
}
}
return 0;
}
Output:-
Enter the choice where
a) calculate the factorial of a number,
b) check the number is prime or not ,
c) odd or even ,d) exit :
a
Enter the number :
5
Factorial of 5! is 120
Enter the choice where
a) calculate the factorial of a number,
b) check the number is prime or not ,
c) odd or even ,d) exit :
d // Exit .
7.)WAP to convert any number (in digit) into words.
/* program to convert any number(in digit) into word.
for example : 4 3 2 0
Four Three Two zero*/
#include <stdio.h>
#include <conio.h>
int main()
{
int num, i, rev = 0, rem;
printf("Enter the number :\n");
scanf("%d", &num);
while (num != 0) // loop for find reverse of the number.
{
rem = num % 10;
rev = rev * 10 + rem;
num /= 10;
}
num = rev;
while (num != 0)
{
rem = num % 10;
num /= 10;
switch (rem)
{
case 0:
printf("Zero\t");
break;
case 1:
printf("First\t");
break;
case 2:
printf("Two\t");
break;
case 3:
printf("Three\t");
break;
case 4:
printf("Four\t");
break;
case 5:
printf("Five\t");
break;
case 6:
printf("Six\t");
break;
case 7:
printf("Seven\t");
break;
case 8:
printf("Eight\t");
break;
case 9:
printf("Nine\t");
break;
default :
printf("Invalid Choice!");
}
}
return 0;
}
Output :-
Enter the number :
86459
Eight Six Four Five Nine
8.)WAP of swapping using function.
// program to swaping using function.
#include <stdio.h>
#include <conio.h>
void swap();
int main()
{
swap();
return 0;
}
void swap()
{
int a, b, s;
printf("Enter a:\n");
scanf("%d", &a);
printf("Enter b:\n");
scanf("%d", &b);
s = a;
a = b;
b = s;
printf("a=%d\n", a);
printf("b=%d\n", b);
}
Output:-
Enter a:
520
Enter b:
365
a=365
b=520
9.) WAP for factorial using Recursion.
// Program of factorial using recursion.
#include <stdio.h>
#include <conio.h>
int fact(int);
int main()
{
int f, n;
printf("Enter number:\n");
scanf("%d", &n);
f = fact(n);
printf("%d!=%d", n, f);
return 0;
}
int fact(int n)
{
if (n == 0 || n == 1)
{
return 1;
}
else
{
return (n * fact(n - 1));
}
}
Output:
Enter number:
5
5!=120
😄😄😄 Thank you 😄😄😄
10.)WAP for Fibonacci series using recursion.
// program of fibonacci series by using recursion.
#include <stdio.h>
#include <conio.h>
int fibo(int, int, int);
int main()
{
int a,b,t,f;
printf("Enter terms you can print:\n");
scanf("%d",&t);
printf("Enter first two terms:\n");
scanf("%d%d",&a,&b);
f=fibo(a,b,t);
return 0;
}
int fibo(int a,int b,int t)
{
if(t>0)
{
printf("%d\t",a);
return(fibo(b,a+b,t-1));
}
}
Output:
Enter terms you can print:
9
Enter first two terms:
1
1
1 1 2 3 5 8 13 21 34
11.) WAP to obtain running sum of first 25 Natural number using recursion
// program to obtain sum of first 25 natural number.
#include<stdio.h>
#include<conio.h>
int nat(int);
int main()
{
int n,s;
printf("How many natural number you can print:\n");
scanf("%d",&n);
s=nat(n);
printf("The sum of first %d natural number is %d",n,s);
return 0;
}
int nat(int n)
{
if(n!=0)
{
return(nat(n-1)+n);
}
}
Output :
How many natural number you can print:
25
The sum of first 25 natural number is 325
😄😄😄 Thank you 😄😄😄
12.)WAP to calculate area and perimeter of a Triangle, a Square, a Circle using macro.
#include<stdio.h>
#include<conio.h>
#define ptriangle(a,b,c) a+b+c
#define atriangle(b,h) (b*h)/2
#define psquare(a) 4*a
#define asquare(a) a*a
#define pcircle(r) 2*3.14*r
#define acircle(r) 3.14*r*r
int main()
{
float a,b,c,side,r,perimeter,h,area;
char ch;
printf("Enter the choice in which you
can find the area and perimeter \na)
Triangle,\nb) Square,\nc)Circle:\n");
scanf("%c",&ch);
switch(ch)
{
case 'a':
printf("Enter the sides of Triangle:\n");
scanf("%f%f%f",&a,&b,&c);
perimeter=ptriangle(a,b,c);
printf("Enter the base and height of
triangle:\n");
scanf("%f%f",&b,&h);
area=atriangle(b,h);
printf("Perimeter and area of triangle is
p=%.2f\ta=%.2f",perimeter,area);
break;
case 'b':
printf("Enter the side of square:\n");
scanf("%f",&side);
perimeter=psquare(side);
area=asquare(side);
printf("Perimeter and area of square is
p=%.2f\ta=%.2f",perimeter,area);
break;
case 'c':
printf("Enter the radius of circle:\n");
scanf("%f",&r);
perimeter=pcircle(r);
area=acircle(r);
printf("Perimeter and area of circle is
p=%.2f\ta=%.2f",perimeter,area);
break;
default :
printf("Invalid Choice!");
}
return 0;
}
Output:
Enter the choice in which you can find
the area and perimeter
a) Triangle,
b) Square,
c)Circle:
a
Enter the sides of Triangle:
4
2
1
Enter the base and height of triangle:
4
2
Perimeter and area of triangle is p=7.00
a=4.00
13.)Write a program for :
a. Linear search
#include<stdio.h>
int main()
{
int list[10]={12,5,4,6,7,9,10,2,6,0};
int search ,i;
printf("Enter the element you
can search in the list:\n");
scanf("%d", &search);
for(i=0;i<10;i++)
{
if(search==list[i])
{
printf("Search successful at
the position %d",i+1);
break;
}
}
if(i==10)
{
printf("Invalid search!");
}
return 0;
}
Output :
Enter the element you can search in the list:
10
Search successful at the position 7
b. Binary search
#include<stdio.h>
int main()
{
int list[10]={1,2,3,4,5,6,7,8,9,10};//sorted array
int search,beg,end,mid;
printf("Enter the element you
can search in the list:\n");
scanf("%d",&search);
beg=0;
end=9;
while(beg<=end)
{
mid = (beg+end)/2;
if(search==list[mid])
{
printf("search successful!\n");
break;
}
else
{
if(search>list[mid])
{
beg=mid+1;
}
else
{
end=mid-1;
}
}
}
if(beg>end)
{
printf("Invalid search!");
}
return 0;
}
Output :
Enter the element you can search in the list:
6
search successful!
c. Selection sort :
#include<stdio.h>
int main()
{
int arr[5]={9,5,10,2,7};
int i,j,t;
for(i=0;i<4;i++)
{
for(j=i+1;j<5;j++)
{
if(arr[i]>arr[j])
{
t=arr[i];
arr[i]=arr[j];
arr[j]=t;
}
}
}
printf("The sorted array are:\n");
for(i=0;i<5;i++)
{
printf("%d\t",arr[i]);
}
return 0;
}
Output :
The sorted array are:
2 5 7 9 10
d. Bubble sort :
# include<stdio.h>
int main()
{
int list[10]={6,3,8,9,1};
int phase,step,i,temp;
for(phase=0;phase<4;phase++)
{
for(step=0;step<4-phase;step++)
{
if(list[step]>list[step+1])
{
temp=list[step];
list[step]=list[step+1];
list[step+1]=temp;
}
}
}
printf("The sorted array are:\n");
for(i=0;i<5;i++)
{
printf("%d\t",list[i]);
}
return 0;
}
Output :
The sorted array are:
1 3 6 8 9
e. Insertion sort :
# include<stdio.h>
int main()
{
int list[10]={4,6,1,2,10,3,7,5,8,9};
int phase,step,temp,i;
for(phase=1;phase<10;phase++)
{
temp=list[phase];
step=phase-1;
while((step>=0)&&(temp<list[step]))
{
list[step+1]=list[step];
step--;
}
list[step+1]=temp;
}
printf("The sorted array are:\n");
for(i=0;i<10;i++)
{
printf("%d\t",list[i]);
}
return 0;
}
Output :
The sorted array are:
1 2 3 4 5 6 7 8 9 10
14.)WAP to show all string operation.
/* WAP to show all string operation*/
#include<stdio.h>
#include<string.h>
int main()
{
char a[20],b[20];
printf("Enter the two strings a and b:\n");
gets(a);
gets(b);
printf("The lenght of string a is %d\n",strlen(a));// find lenght of a string.
printf("The lenght of string b is %d\n",strlen(b));
printf("Combine a and b is %s",strcat(a,b));
if(strcmp(a,b)==0)
{
printf("strings are same\n");
}
else
{
printf("strings are not equal\n");
}
// strrev reverse the string.
printf("Reverse of string a is %s",strrev(a));
return 0;
}
Output:
Enter the two strings a and b:
The lenght of string a is 5
The lenght of string b is
Combine a and b is RohitRahul varshneystrings are not equal
Reverse of string a is yenhsrav luhaRtihoR
15.) WAP to find the data (Roll number, name, department, course, year of joining) of student According to roll number using structure.
#include<stdio.h>
#include<conio.h>
struct data
{
int rollno;
char name[50];
char dep[20];
char course[10];
int yoj;
}d[2];
int main()
{
int rn,i;
printf("Enter the data (Roll number,name,
deparment,course,Year of joining):\n");
for(i=0;i<2;i++)
{
scanf("%d%s%s%s%d",&d[i].rollno,&d[i].name,
&d[i].dep,&d[i].course,&d[i].yoj);
}
printf("Enter the roll no:\n");
scanf("%d",&rn);
for(i=0;i<2;i++)
{
if(rn==d[i].rollno)
{
printf("%d\t%s\t%s\t%s\t%d",d[i].rollno,
d[i].name,d[i].dep,d[i].course,d[i].yoj);
break;
}
}
if(i==2)
{
printf("Invalid Rollno!");
}
return 0;
}
Output :
Enter the data (Roll number,name,deparment,course,Year of joining):
1
mohit
A
BBA
2018
2
akshat
B
BCA
2019
Enter the roll no:
2
2 akshat B BCA 2019
16.) WAP to write and read character/string into and from file.
create a file and write data in the file.
// WAP to write and read character/string into and from file.
#include<stdio.h>
struct student
{
int rollno;
char name[20];
float per;
}d;
FILE*fw;
int main()
{
int i;
fw = fopen("data_store.txt","w");
printf("Enter the data (roll no.,
name, percentage of ) the student:\n");
for(i=0;i<5;i++)// data of 5 student
{
scanf("%d%s%f",&d.rollno,d.name,&d.per);
fprintf(fw,"%d\t%s\t%.2f\n",d.rollno,d.name,d.per);
fflush(stdin);// data input next student easily.
}
fclose(fw);
return 0;
}
Input : data_store.txtEnter the data (roll no.,name,percentage of ) the student:
1
Rohit
86.5
2
Kapil
89.5
3
Samay
96.8
4
Mohan
56.2
5
Aditya
99
Output :
1 Rohit 86.50
2 Kapil 89.50
3 Samay 96.80
4 Mohan 56.20
5 Aditya 99.00
=> now Read the data of the file data_store.txt
#include<stdio.h>
FILE *fr;
int main()
{
char str[80];
char *ptr;
fr=fopen("data_store.txt","r");
while(1)
{
ptr = fgets(str,80,fr);
if(ptr!=NULL)
{
printf("%s",ptr);
}
else
{
break;
}
}
fclose(fr);
return 0;
}
Output :
1 Rohit 86.50
2 Kapil 89.50
3 Samay 96.80
4 Mohan 56.20
5 Aditya 99.00
17.) WAP to count character , space, tab and newline in a file.
#include <stdio.h>
FILE *fp;
int main()
{
int count = 0, tab = 0, space = 0, line = 0;
char ch;
fp = fopen("data_store.txt", "r");
while (1)
{
ch = fgetc(fp);
if (ch == EOF)
{
break;
}
else
{
count++;
if (ch == ' ')
space++;
if (ch == '\t')
tab++;
if (ch == '\n')
line++;
}
}
printf("Total Number of charater in the file:%d\n", count);
printf("Total Number of tab in the file:%d\n", tab);
printf("Total Number of line in the file:%d\n", line);
printf("Total Number of space in the file:%d\n", space);
fclose(fp);
return 0;
}
Output:
Total Number of charater in the file:75
Total Number of tab in the file:9
Total Number of line in the file:4
Total Number of space in the file:5
18.) WAP to copy the content of one file into other file .
// WAP to copy the content of one file into another file.
#include<stdio.h>
#include<conio.h>
FILE *fr;// file read
FILE *fc;// file copy
int main()
{
char *ptr,str[80];
fr=fopen("data_store.txt","r");
fc=fopen("xyz.txt","w");
while (1)
{
ptr=fgets(str,80,fr);
if(ptr==NULL)
{
break;
}
else
{
fputs(ptr,fc);
}
}
fclose(fc);
fclose(fr);
return 0;
}
Output : file copy in xyz.txt1 Rohit 86.50
2 Kapil 89.50
3 Samay 96.80
4 Mohan 56.20
5 Aditya 99.00
**** I hope it is useful to you ****
This comment has been removed by a blog administrator.
ReplyDelete