1. Write C Program to display "Hello World".
#include <stdio.h>
int main()
{
printf("Hello World");
return 0;
}
2. Write C Program to display your name.
#include <stdio.h>
int main()
{
printf(" Alex Lal Karn ");
return 0;
}
3. Write C Program to find sum of two numbers.
#include <stdio.h>
int main()
{
int num1,num2,sum;
printf(" Enter First number : ");
scanf("%d%d",&num1,&num2);
printf(" Enter Second number : ");
scanf("%d",&num2);
sum=num1+num2;
printf("Sum of two numbers is %d ", sum);
return 0;
}
4. Write C Program to calculate area and perimeter of a rectagle.
#include <stdio.h>
int main()
{
int length,breadth,area,perimeter;
printf(" Enter Length of rectanlge : ");
scanf("%d",&length);
printf(" Enter Breadth of rectanlge : ");
scanf("%d",&breadth);
area=length*breadth;
perimeter=2*(length+breadth);
printf("Area of rectangle is %d ", area);
printf(" \n Perimeter of rectangle is %d ", perimeter);
return 0;
}
5. Example programs of type conversion.
Example of Implicit type conversion
Example of Explicit type conversion
#include<stdio.h>
main()
{
float c;
int a=5,b=2;
c=a/b;
printf("Output is %0.2f" ,c);
}
Output is 2.00
}
Example of Explicit type conversion
#include<stdio.h>
main()
{
float c;
int a=5,b=2;
c=(float)a/b;
printf("Output is %0.2f" ,c);
}
Output is 2.50
6. Write C Program to calculate simple interest.
#include <stdio.h>
int main()
{
float p,t,r,si;
printf(" Enter principal : ");
scanf("%f",&p);
printf(" Enter time : ");
scanf("%f",&t);
printf(" Enter rate : ");
scanf("%f",&r);
si=(p*t*r)/100;
printf(" Simple Interst = %0.2f ", si);
return 0;
}
7. Write C Program to calculate sqaure root of given number.
#include <stdio.h>
#include<math.h>
int main()
{
int num,root;
printf(" Enter a number : ");
scanf("%d",&num);
root=sqrt(num);
printf(" Square root of %d = %d ", num , root );
return 0;
}
8. Write C Program to display the greater number among any two numbers.
#include <stdio.h>
int main()
{
int num1,num2;
printf(" Enter First number : ");
scanf("%d",&num1);
printf(" Enter Second number : ");
scanf("%d",&num2);
if(num1>num2)
printf("Greater number is %d",num1);
else
printf("Greater number is %d",num2);
return 0;
}
9. Write C Program to test whether the input number is even or odd.
#include <stdio.h>
int main()
{
int num,rem;
printf(" Enter any number : ");
scanf("%d",&num);
rem=num%2;
if(rem==0)
printf(" Given number is even");
else
printf("Given number is odd.");
return 0;
}
10. Write C Program to find greatest number among three numbers
#include <stdio.h>
int main()
{
int num1,num2,num3;
printf("Enter three numbers");
scanf("%d%d%d",&num1,&num2,&num3);
if(num1>num2&&num1>num3)
printf("%d is greatest",num1);
else if(num2>num1&&num2>num3)
printf("%d is greatest",num2);
else
printf("%d is greatest",num3);
return 0;
}
11. Write C Program to find middle number among three numbers
#include <stdio.h>
int main()
{
int num1,num2,num3;
printf("Enter three numbers");
scanf("%d%d%d",&num1,&num2,&num3);
if(num1>num2&&num1>num3)
printf("%d is greatest",num1);
else if(num2>num1&&num2>num3)
printf("%d is greatest",num2);
else
printf("%d is greatest",num3);
return 0;
}
C program to find the multiplication of given number.
#include <stdio.h>
int main()
{
int num,i,ans;
printf("Enter any number : ");
scanf("%d",&num);
for(i=1;i<=10;i++)
{
ans=num*i;
printf("\n %d ",ans);
}
return 0;
}
C program to find the factorial of the given number.
The product of a given positive integer multiplied by all lesser positive integers: The quantity five factorial (5!) = 5x4 x 3 x 2 x 1 = 120.
The product of a given positive integer multiplied by all lesser positive integers: The quantity five factorial (5!) = 5x4 x 3 x 2 x 1 = 120.
#include <stdio.h>
int main()
{
int num,i,f=1;
printf("Enter any number : ");
scanf("%d",&num);
for(i=num;i>=1;i--)
{
f=f*i;
}
printf("\n Factorial of %d is %d",num,f);
return 0;
}
Lab-27 Q1: C program to award grade on the basis of mark in Computer:
90+ = A+
80 to 89 = A
70 to 79 = B+
60 to 69 = B
50 to 59 = C+
40 to 49 = C
35 to 39 = D
Below 35 = NG
#include <stdio.h>
int main()
{
int mark;
printf("Enter Computer mark : ");
scanf("%d",&mark);
if(mark>=90)
printf("Computer Grade = A+");
if(mark>=80&&mark<90)
printf("Computer Grade = A");
if(mark>=70&&mark<80)
printf("Computer Grade = B+");
if(mark>=60&&mark<70)
printf("Computer Grade = B");
if(mark>=50&&mark<60)
printf("Computer Grade = C+");
if(mark>=40&mark<50)
printf("Computer Grade = C");
if(mark>=35&mark<40)
printf("Computer Grade = D");
else
printf("Computer Grade = NG");
return 0;
}
Lab-27 Q2: C program to display 1 for Sunday, 2 for Monday and so on.
#include <stdio.h>
int main()
{
int choice;
printf("Enter your choice : ");
scanf("%d",&choice);
switch(choice)
{
case 1:
printf("Sunday");
break;
case 2:
printf("Monday");
break;
case 3:
printf("Tuesday");
break;
case 4:
printf("Wednesday");
break;
case 5:
printf("Thursday");
break;
case 6:
printf("Friday");
break;
case 7:
printf("Saturday");
break;
default:
printf("Wrong Choice");
}
return 0;
}
Lab-28 Q1: C program to display first ten natural numbers.
for loop
#include <stdio.h> int main() { int i; for(i=1;i<=10;i++) { printf("%d\n",i) ; } return 0; }while loop
#include <stdio.h> int main() { int i=1; while(i<=10) { printf("%d\n",i) ; i++; } return 0; }do while loop
#include <stdio.h> int main() { int i=1; do { printf("%d\n",i) ; i++; } while(i<=10); return 0; }Lab-28 Q2: C program to calculate and display factorial of given number[n!=n*n-1*n-2*....*1] e.g. [5!=5*4*3*2*1=120]
#include <stdio.h>
int main()
{
int i,n,f=1;
printf("Enter a number: ");
scanf("%d",&n);
for(i=n;i>=1;i--)
{
f=f*i;
}
printf("Factorial of %d = %d",n,f);
return 0;
}
Lab-28 Q2: C program to calculate and display factorial of given number[n!=n*n-1*n-2*....*1] e.g. [5!=5*4*3*2*1=120]
#include <stdio.h>
int main()
{
int i,n,f=1;
printf("Enter a number: ");
scanf("%d",&n);
for(i=n;i>=1;i--)
{
f=f*i;
}
printf("Factorial of %d = %d",n,f);
return 0;
}
Lab-29 Q1: C program to display greatest number among ten different numbers using array
#include <stdio.h>
int main()
{
int num[10],i,great;
for(i=0;i<10;i++)
{
printf("Enter num[%d] : ",i+1);
scanf("%d",&num[i]);
}
great=num[0];
for(i=1;i<10;i++)
{
if(num[i]>great)
great=num[i];
}
printf("Greatest number = %d",great);
return 0;
}
Lab-29 Q2: C program to sort five integers numbers in ascending order
#include <stdio.h>
int main()
{
int num[5],i,j,temp;
for(i=0;i<5;i++)
{
printf("Enter num[%d] : ",i+1);
scanf("%d",&num[i]);
}
for(i=0;i<5;i++)
{
for(j=i+1;j<5;j++)
{
if(num[i]>num[j])
{
temp=num[i];
num[i]=num[j];
num[j]=temp;
}
}
}
printf("Sorted in Ascending order\n");
for(i=0;i<5;i++)
{
printf("%d\n ",num[i]);
}
return 0;
}
Lab-30 Q1: C program to input the age of 20 students and count the number of students having age in between 20 to 25.
#include<stdio.h>
int main()
{
int age[20],i,count=0;
for(i=0;i<20;i++)
{
printf("Enter age[%d] : ",i+1);
scanf("%d", &age[i]);
}
for(i=0;i<20;i++)
{
if(age[i]>=20 && age[i]<=25)
count++;
}
printf("Total number of students having age in between 20 to 25 is %d ", count);
return 0;
}
Lab-30 Q2: C program to input 'n' numbers and search whether it is in the list or not.[Program for sequential search].
#include<stdio.h>
int main()
{
int n,num[100],i,searchnum;
printf(" Enter array size not more than 100 : ");
scanf("%d",&n);
for(i=0;i<n;i++)
{
printf("Enter num[%d] :", i+1);
scanf("%d", &num[i]);
}
printf("Enter a number to be searched ");
scanf("%d",&searchnum);
for(i=0;i<n;i++)
{
if(searchnum==num[i])
{
printf("%d is in the list", searchnum);
break;
}
}
if(n==i)
printf(" %d is not in the list", searchnum);
return 0;
}
Lab-31 Explain strlen(),strupr(),strlwr(),strcat(),strrev(),strcpy() with examples.
String Handling Functions
The C library supports a large number of string handling functions that can be used to carry out many of the string manipulation. The header file #include<string.h> is used for string manipulation functions. Some of the common string manipulation functions are:
1. strlen() functionThe strlen() function returns the length of a string which takes the string name as an argument.
Syntax:l=strlen(str);
where, str is the name of string and l is the length of the string, returned by function.
Example Program of strlen() function
#include<stdio.h>
#include<string.h>
main()
{
char str[100];
int l;
printf(" Enter a string : ");
scanf("%s",str);
l=strlen(str);
printf(" The length of string is %d ",l);
}
2. strrev() functionThe strrev() function is used to reverse the given string.
Syntax:strrev(str);
where str is string to be reversed.
Example Program of strrev() function
#include<stdio.h>
#include<string.h>
main()
{
char str[100];
printf(" Enter a string : ");
scanf("%s",str);
strrev(str);
printf(" Reverse of the given string is %s ",str);
}
3. strcpy() function
The strcpy() function is used to copy one string into another string.
Syntax:strcpy(destination,source)
or
strcpy(strl,str2);
where strl,str2 are two strings.
The content of string str2 is copied on string strl.
Example Program of strcpy() function
#include<stdio.h>
#include<string.h>
main()
{
char str1[100],str2[100];
printf(" Enter a string : ");
scanf("%s",str1);
strcpy(str2,str1);
printf(" After copying the string is %s ",str2);
}
4. strcat() function
The strcat() function is used to join or concatenate one string into another string.
Syntax:strcat(strl,str2);
where str1,str2 are two strings. The content of string str2 is concatenated with string str1.
Example Program of strcat() function
#include<stdio.h>
#include<string.h>
main()
{
char str1[100],str2[100];
printf(" Enter First string : ");
scanf("%s",str1);
printf(" Enter Second string : ");
scanf("%s",str2);
strcat(str1,str2);
printf(" After concatenating the two string is %s ",str1);
}
5. strcmp( ) function
The strcmp() function is used to compare two strings, character by character and stops comparison when there is a difference in the ASCII value or the end of any one string and returns ASCII difference of the character that is integer.
Syntax:v=strcmp(strl,str2);
Where, str1 and str2 are two strings to be compared and v is a value returned by the function which is either zero(equal), positive value(descending) or negative value(ascending).
Example Program of strcmp() function
#include<stdio.h>
#include<string.h>
main()
{
char str1[100],str2[100];
int v;
printf(" Enter First string : ");
scanf("%s",str1);
printf(" Enter Second string : ");
scanf("%s",str2);
v=strcmp(str1,str2);
if(v==0)
printf(" Both strings are same. ");
else if(v>0)
printf(" %s comes after %s ",str1,str2);
else
printf(" %s comes before %s ",str1,str2);
}
6. strlwr() functionThe strlwr() function is used to convert upper case characters of string into lower case characters.
Syntax:strlwr (str);
where str is string to be converted into lower case characters.
Example Program of strlwr() function
#include<stdio.h>
#include<string.h>
main()
{
char str[100];
printf(" Enter a string : ");
scanf("%s",str);
strlwr(str);
printf(" The string in lowercase is %s ",str);
}
7. strupr() functionThe strupr() function is used to convert lower case characters of string into upper case characters.
Syntax:strupr (str);
where str is string to be converted into upper case characters.
Example Program of strupr() function
#include<stdio.h>
#include<string.h>
main()
{
char str[100];
printf(" Enter a string : ");
scanf("%s",str);
strupr(str);
printf(" The string in uppercase is %s ",str);
}