Feel free to use the source code on your system.
C program for lowwer case of a string using library functions
#include<stdio.h>
#include<string.h>
#include<conio.h>
void main()
{
char str1[30];
clrscr();
printf("\nEnter a string:");
scanf("%s",str1);
strlwr(str1);
printf("\nYou have enter string: %s",str1);
getch();
}
C program for upper case of a string using library functions
#include<stdio.h>
#include<string.h>
#include<conio.h>
void main()
{
char str1[30];
clrscr();
printf("\nEnter a string:");
scanf("%s",str1);
strupr(str1);
printf("\nYou have enter string: %s",str1);
getch();
}
C program for concatenation of two string using library functions
#include<stdio.h>
#include<string.h>
#include<conio.h>
void main()
{
char str1[30],str2[30];
clrscr();
printf("\nEnter a string 1:");
scanf("%s",str1);
printf("\nEnter a string 2:");
scanf("%s",str2);
strcat(str1,str2);
printf("\nYou have enter string: %s",str1);
getch();
}
C program for reversing a string using library functions
#include<stdio.h>
#include<string.h>
#include<conio.h>
void main()
{
char str1[30];
clrscr();
printf("\nEnter a string:");
scanf("%s",str1);
strrev(str1);
printf("\nYou have enter string: %s",str1);
getch();
}
C program for copying a string using library function
#include<stdio.h>
#include<string.h>
#include<conio.h>
void main()
{
char str1[30],str2[30];
clrscr();
printf("\nEnter a string:");
scanf("%s",str1);
strcpy(str2,str1);
printf("\nYou have enter string: %s",str2);
getch();
}
C program for writing Alphabets in C using asterik(*)
#include<stdio.h>
#include<conio.h>
void main()
{
int j,i;
clrscr();
for(i=1;i<=7;i++)
{
for(j=1;j<=56;j++)
{
if(j==1||i==1&&j==2||i==1&&j==3||i==1&&j==4||i==7&&j==4||i==7&&j==2||i==7&&j==3||i==7&&j==4||i==6&&j==4||i==2&&j==4||j==7||j==10||i==1&&j==8||i==1&&j==9||i==7&&j==8||i==7&&j==9||j==13||i==1&&j==14||i==1&&j==15||i==7&&j==14||i==7&&j==15||j==16&&i==2||j==16&&i==3||j==16&&i==4||j==16&&i==5||j==16&&i==6||j==19||i==1&&j==20||i==1&&j==21||i==1&&j==22||i==4&&j==20||i==4&&j==21||i==4&&j==22||i==7&&j==20||i==7&&j==21||i==7&&j==22||i==2&&j==27||i==2&&j==29||i==3&&j==28||j==30||j==26||j==33||j==36||i==1&&j==34||i==1&&j==35||i==7&&j==34||j==45||i==7&&j==35||j==39||i==1&&j==40||i==1&&j==41||i==7&&j==40||i==7&&j==41||j==42&&i==2||j==42&&i==3||j==42&&i==4||j==42&&i==5||j==42&&i==6||j==19||i==1&&j==46||i==1&&j==47||i==1&&j==48||i==4&&j==46||i==4&&j==47||i==4&&j==48||i==7&&j==46||i==7&&j==47||i==7&&j==48||j==55||i==1&&j==52||i==1&&j==53||i==1&&j==54||i==2&&j==52||i==4&&j==54||i==4&&j==56)
{
printf("*");
}
else
{
printf(" ");
}
}
printf("\n");
}
getch();
}
C Program for sum of columns of the matrix
#include<stdio.h>
#include<conio.h>
void main()
{
int i,j,a[3][3],sum1=0,sum2=0,sum3=0;
clrscr();
printf("\nEnter the matrix");
for(i=0;i<3;i++)
{
for(j=0;j<3;j++)
{
scanf("%d",&a[i][j]);
}
}
printf("\nYou have entered matrix:\n");
for(i=0;i<3;i++)
{
for(j=0;j<3;j++)
{
printf("\t%d",a[i][j]);
}
printf("\n");
}
for(i=0;i<3;i++)
{
for(j=0;j<3;j++)
{
if(j==0)
sum1=a[i][j]+sum1;
else if(j==1)
sum2=a[i][j]+sum2;
else if(j==2)
sum3=a[i][j]+sum3;
}
}
printf("\nSum1=%d\nSum2=%d\nSum3=%d",sum1,sum2,sum3);
getch();
}
C program for displaying UNIT matrix.
#include<stdio.h>
#include<conio.h>
void main()
{
int i,j,a[3][3];
clrscr();
printf("\nEnter the matrix:\n\n");
for(i=0;i<3;i++)
{
for(j=0;j<3;j++)
{
if(i==j)
{
a[i][j]=1;
printf("%d\t",a[i][j]);
}
else
{
a[i][j]=0;
printf("%d\t",a[i][j]);
}
}
printf("\n");
}
getch();
}
C program for transposing of matrix.
#include<stdio.h>
#include<conio.h>
void main()
{
int i,j,a[3][3];
clrscr();
printf("\nEnter the matrix:");
for(i=0;i<3;i++)
{
for(j=0;j<3;j++)
{
scanf("%d",&a[i][j]);
}
}
for(i=0;i<3;i++)
{
for(j=0;j<3;j++)
{
printf("%d\t",a[i][j]);
}
printf("\n");
}
printf("\n\n");
printf("\natfer transpose\n");
for(j=0;j<3;j++)
{
for(i=0;i<3;i++)
{
printf("%d\t",a[i][j]);
}
printf("\n");
}
getch();
}
C program for addition of two matrix
void main()
{
int i,j,a[3][3],b[3][3],add[3][3];
clrscr();
printf("\nEnter the matrix:");
for(i=0;i<3;i++)
{
for(j=0;j<3;j++)
{
scanf("%d",&a[i][j]);
}
}
for(i=0;i<3;i++)
{
for(j=0;j<3;j++)
{
scanf("%d",&b[i][j]);
}
}
printf("\n\n");
for(i=0;i<3;i++)
{
for(j=0;j<3;j++)
{
printf("%d\t",a[i][j]);
}
printf("\n");
}
printf("\n\n");
for(i=0;i<3;i++)
{
for(j=0;j<3;j++)
{
printf("%d\t",b[i][j]);
}
printf("\n");
}
for(i=0;i<3;i++)
{
for(j=0;j<3;j++)
{
add[i][j]=a[i][j]+b[i][j];
}
}
printf("\n\n");
for(i=0;i<3;i++)
{
for(j=0;j<3;j++)
{
printf("%d\t",add[i][j]);
}
printf("\n");
}
getch();
}
C program for displaying matrix
#include<stdio.h>
#include<conio.h>
void main()
{
int i,j,a[3][3];
clrscr();
printf("\nEnter the matrix:");
for(i=0;i<3;i++)
{
for(j=0;j<3;j++)
{
scanf("%d",&a[i][j]);
}
}
for(i=0;i<3;i++)
{
for(j=0;j<3;j++)
{
printf("%d\t",a[i][j]);
}
printf("\n");
}
getch();
}
C program for sorting (BUBBLE SORT)
#include<stdio.h>
#include<conio.h>
void main()
{
int i,j,temp,a[10];
clrscr();
printf("\nEnter the numbers: ");
for(i=0;i<10;i++)
scanf("%d",&a[i]);
printf("\nBefore sorting- ");
for(i=0;i<10;i++)
printf("\t%d",a[i]);
for(i=0;i<10;i++)
{
for(j=i+1;j<10;j++)
{
if(a[i]>a[j])
{
temp=a[i];
a[i]=a[j];
a[j]=temp;
}
}
}
printf("\nAfter sorting: ");
for(i=0;i<10;i++)
printf("\t%d",a[i]);
getch();
}
C program for finding sum of n numbers.
//find sum of n no
#include<stdio.h>
#include<conio.h>
void main()
{
int sum=0,n,i;
printf("\nEnter n number");
scanf("%d",&n);
for(i=0;i<n;i++)
sum=sum+i;
printf("Sum of n number - %d",sum);
getch();
}
C program for sum of 10 numbers.
#include<stdio.h>
#include<conio.h>
void main()
{
int sum=0,i;
clrscr();
for(i=0;i<10;i++)
sum=sum+i;
printf("sum of ten no- %d",sum);
getch();
}
C program for displaying 100 even numbers.
#include<stdio.h>
#include<coonio.h>
void main()
{
int num=0,i;
clrscr();
for(i=0;i<=100;i++)
{ if(num%2==0)
{
printf("\t%d",num);
}
num++;
}
getch();
}
C program for displaying day
// C program displaying day
#include<stdio.h>
#include<conio.h>
void main()
{
int a;
clrscr();
printf("Enter a number between 1-7 for displaying day!!!-");
scanf("%d",&a);
if(a==1)
printf("\nThe day is monday!!!");
else if(a==2)
printf("\nThe day is tuesday!!!");
else if(a==3)
printf("\nThe day is wednesday!!!");
else if(a==4)
printf("\nThe day is thursday!!!");
else if(a==5)
printf("\nThe day is friday!!!");
else if(a==6)
printf("\nThe day is saturday!!!");
else if(a==7)
printf("\nThe day is sunday!!!");
getch();
}
C program for find greater number
//To find Greater number
#include<stdio.h>
#include<conio.h>
void main()
{
int a,b,c;
clrscr();
printf("\nEnter three numbers- ");
scanf("%d%d%d",&a,&b,&c);
if(a>b && a>c)
printf("\n%d is greater number!!!",a);
else if(b>a && b>c)
printf("\n%d is greater number!!!",b);
else
printf("\n%d is greater number!!!",c);
getch();
}
C program for find vowel or consonant
//to find vowel our consonant
#include<stdio.h>
#include<conio.h>
void main()
{
char ch;
clrscr();
printf("\nEnter a Alphabet- ");
scanf("%c",&ch);
if(ch=='a'|| ch=='e'|| ch=='i'|| ch=='o'|| ch=='u')
printf("\nYou have entered a vowel!!!");
else if(ch=='A'|| ch=='E'|| ch=='I'|| ch=='O'|| ch=='U')
printf("\nYou have entered a vowel!!!");
else
printf("\nYou have entered a consonant!!!");
getch();
}
C program for sum of first and last digit of four digit number
//Addition of four digit numbe
#include<stdio.h>
#include<conio.h>
void main()
{
int sum=0,rem,num;
clrscr();
printf("\nEnter a four digit number- ");
scanf("%d",&num);
rem=num%10;
sum=sum+rem;
num=num/10;
rem=num%10;
sum=sum+rem;
num=num/10;
rem=num%10;
sum=sum+rem;
num=num/10;
rem=num%10;
sum=sum+rem;
num=num/10;
printf("\nAddition of four digit number- %d",sum);
getch();
}
C program to reverse a four digit number
void main()
{
int num,rev=0,rem;
clrscr();
printf("\nEnter a four digit number- ");
scanf("%d",&num);
rem=num%10;
rev=rev*10+rem;
num=num/10;
rem=num%10;
rev=rev*10+rem;
num=num/10;
rem=num%10;
rev=rev*10+rem;
num=num/10;
rem=num%10;
rev=rev*10+rem;
num=num/10;
printf("\nThe reversed number- %d",rev);
getch();
}
C program for finding area of triangle
//C program to find area of triangle
#include<stdio.h>
#include<conio.h>
#define half 0.5
void main()
{
int length,breadth;
float area;
clrscr();
printf("\nEnter the Length- ");
scanf("%d",&length);
printf("\nEnter the Breadth- ");
scanf("%d",&breadth);
area=half*length*breadth;
printf("\nArea of triangle- %.3f",area);
getch();
}
C Program for swaping two numbers without using third vaariable
//swaping two number without using third variable
#include<stdio.h>
#include<conio.h>
void main()
{
int a,b,temp;
clrscr();
printf("\nEnter value of A- ");
scanf("%d",&a);
printf("\nEnter value of B- ");
scanf("%d",&b);
a=a+b;
b=a-b;
a=a-b;
printf("\nAter Swap- ");
printf("A=%d\t\tB=%d",a,b);
getch();
}
C Program for find Area
void main()
{
int r;
float area;
clrscr();
printf("\nEnter a number to find the Area- ");
scanf("%d",&r);
area=pie*r*r;
printf("\nArea= %.2f",area);
getch();
}
C Program for swaping two variable using third variable
#include<stdio.h>
#include<conio.h>
void main()
{
int a,b,temp;
temp=0;
clrscr();
printf("\nEnter number A: ");
scanf("%d",&a);
printf("\nEnter number B: ");
scanf("%d",&b);
temp=a;
a=b;
b=temp;
printf("\nAfter SWAP:");
printf("A=%d\t\tB=%d",a,b);
getch();
}
C Program for displaying discount
#include<stdio.h>
#include<conio.h>
void main()
{
int price,amt,no,disc=0;
clrscr();
printf("Enter the amount you have purchased- ");
scanf("%d",&amt);
printf("Enter the no: ");
scanf("%d",&no);
price=amt*no;
if(price>2000)
{
disc=price-price*40/100;
printf("\nYou have got discount of rupees-%d ",disc);
}
else if(price<1000)
{
disc=price-price*30/100;
printf("\nYou have got discount of rupees-%d ",disc);
}
getch();
}
C Program for printing a number n time
#include<stdio.h>
#include<conio.h>
void main()
{
int num,i=1;
clrscr();
printf("Enter a number-");
scanf("%d",&num);
while(i<=num)
{
printf("\n%d",num);
i++;
}
getch();
}
C program for displaying 1 - 10 table.
//display 1-10 table
#include<stdio.h>
#include<conio.h>
void main()
{
int num=1,i,j;
clrscr();
for(i=1;i<11;i++)
{
for(j=1;j<=10;j++)
printf("\n%d X %d = %d",num,j,num*j);
printf("\t");
num++;
}
getch();
}
C program for displaying pattern
//c program for displaying pattern
#include<stdio.h>
#include<conio.h>
void main()
{
int j,i;
clrscr();
for(i=0;i<=4;i++)
{
for(j=0;j<=4;j++)
{
if(i==0||i==4||j==0||j==4||i==2&&j==2)
{
printf("*");
}
else
printf(" ");
}
printf("\n");
}
getch();
}
C program for displaying elements in array
//C program for displaying elements in array
#include<stdio.h>
#include<conio.h>
void main()
{
int j,i;
clrscr();
printf("Enter the array- ");
for(i=0;i<10;i++)
scanf("%d",&a[i]);
printf("\nThe array element -\n ");
for(i=0;i<10;i++)
printf("%d\t",a[i]);
getch();
}
C program for finding out the leap year
//to find out the leap year
#include<stdio.h>
#include<conio.h>
void main()
{
int year;
clrscr();
printf("\nEnter a year- ");
scanf("%d",&year);
if(year%4==0 && year%100==0 || year%400==0)
printf("\nThe year you have enter is leap year!!!");
else if(year%4!=0 && year%100!=0 || year%400!=0)
printf("\nThe year you have enter is not leap year!!!");
getch();
}
C program for addition of four digit number
//Addition of four digit number
#include<stdio.h>
#include<conio.h>
void main()
{
int sum=0,rem,num;
clrscr();
printf("\nEnter a four digit number- ");
scanf("%d",&num);
rem=num%10;
sum=sum+rem;
num=num/10;
rem=num%10;
sum=sum+rem;
num=num/10;
rem=num%10;
sum=sum+rem;
num=num/10;
rem=num%10;
sum=sum+rem;
num=num/10;
printf("\nAddition of four digit number- %d",sum);
getch();
}
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