Sample C prog For Demo Of Structure

struct student
{
char name[30];
int mark1,mark2,mark3,mark4,total;
}S[10];
void main()
{int i=0;
clrscr();
printf("Enter the name 7 marks of 4 sub of call student");
for(i=0;i<=10;i++)
{
scanf("%s%d%d%d%d",&S[i].name,&S[i].mark1,&S[i].mark2,&S[i].mark3,&S[i].mark4);
S[i].total=S[i].mark1 + S[i].mark2 + S[i].mark3 + S[i].mark4;

}
printf("the name of the students & total marks are \n");
for(i=0;i<=10;i++)
{                                 

printf("%s \t%d\n",S[i].name,S[i].total);
}getch();
}

Sample C Prog For Recursive Function

#include
#include
void fibo(int, i nt);
void main()
{
 int i, t, old=0, current=1,new;
 clrscr();
 printf("%d\t%d\t",old, current);
 fibo(old, current);
 printf("\n\n\n\n\npress any key to exit");
 getch();
 }
 void fibo(int old, int current)
  {static int terms=2;
   int new;
   if(terms<20)
    {
     new=current+old;
     printf("%d\t",new);
     fibo(current,new);
     terms=terms+1;
     }
     else
     return;
     }

Sample C Prog For Prime Number

#include

#include

void main()

{

int n,a;

clrscr();

printf("the input value of n is");

scanf("%d",&n);

for(a=2;a{

if(n%a==0);

{

printf("%d is a not a prime number",n);

break;

}

}

if(a==n);

{

printf("%d is a prime number",n);

}

getch();

}

Sample C Prog For Swapping

#include
#include
void main()
{
int a,b,c;
clrscr();
printf("the value of a,b is");
scanf("%d%d",&a,&b);
c=a;
a=b;
b=c;
printf("the value of a is %d,the value of b is%d",a,b);
getch();
}

Sample C prog. For Concatination of Strings

#include 
#include
#include
void main()
{
char a[20],b[10];
int i,j;
clrscr();
printf("\n\n\t string compare & concatenation");
printf("\n\nEnter the 1st string :");
gets(a);
printf("\nEnter the 2nd string :");
gets(b);
if(strcmp(a,b)<0)
{
     strcat(a,b);
     printf("\n\n Concatenated String :");
     puts(a);
     }
else
     printf("\n\n 2nd String is smaller or equal to 1st");
     getch();
     }

Sample C prog For Matrix Multiplication

#include
#include
void main()
{
int no,m[20][20],r,c;
clrscr();
printf("No till where tables are to be printed");
scanf("%d",&no);
for(r=0;r<10;r++)
{
   for(c=0;c<no;c++)
   {
    m[r][c]=(r+1)*(c+1);
    printf("\t %d",m[r][c]);
   }
       printf("\n");
}
getch();
}

Sample C Prog. For Calculator operations

#include
#include
#include
void main()
{
int a,m;
clrscr();
do
{
printf("\n\nEnter the choice what u want to do?\n");
printf("1.Addition\n2.Substractions\n3.Multiplication\n4.Division\n5.Power\n6.Souare Root\n");
scanf("%d",&a);
switch(a)
{
case 1:
{
int num1,num2,sum;
printf("Enter the 2 nos.::\n");
scanf("%d%d",&num1,&num2);
sum=num1+num2;
printf("Sum=%d",sum);
}break;
case 2:
{
int num3,num4,diff;
printf("Enter the 2 nos.::\n");
scanf("%d%d",&num3,&num4);
diff=num3-num4;
printf("Difference = %d",diff);
}break;
case 3:
{
int num5,num6,prdct;
printf("Enter the 2 nos.::\n");
scanf("%d%d",&num5,&num6);
prdct=num5*num6;
printf("Product = %d",prdct);
}break;
case 4:
{
float num7,num8,div;
printf("Enter the 2 nos.::\n");
scanf("%f%f",&num7,&num8);
div=num7/num8;
printf("Division = %f",div);
}break;
case 5:
{
float num9,num10,power;
printf("Enter the 2 nos.::\n");
scanf("%f%f",&num9,&num10);
power=pow(num9,num10);
printf("value of power=%f",power);
}break;
case 6:
{
float num11,srt;
printf("Enter the no::");
scanf("%f",&num11);
srt=sqrt(num11);
printf("square root of no. = %f",srt);
}break;
}
printf("\n\nWanna do more Calculations...\n1.yes\n2.no\n::");
scanf("%d",&m);
}
while(m==1);

getch();
}

Sample prog. Of C for Checking A Palindrome

#include
      #include

     void main()
      {
       char a[50] , b [50];
       int x;
       clrscr();
       printf("Enter string  ");
       gets(a);
       strcpy(b,a);
       strrev(b);
       x = strcmp(a,b);
       if ( x == 0)
       {
 printf("it is a palindrome");
 }
       else
       {
       printf(" it is not palindrome");
       }
       getch();
       }

Sample Program For Adding Elements into the Array

#include
void main()
{
int i , marks [20] ;
float sum = 0 ,avg;
clrscr();
for(i = 0 ; i<20 ;i++)
{
printf("Enter marks :");
scanf("%d",&marks[i]);
}
for(i = 0; i <20 ; i++)
{
sum = sum + marks[i];
}
avg = sum / 20;
printf("\nThe sum is %f",sum);
printf("\nThe average is %f",avg);
getch();
}

Sample program for Concatnating String Using Pointers

#include
#include
#include
void main()
{
char *p[25];
char *q[25];
char a[25], b[25];
int c,d,x;
clrscr();
printf("MENU\n 1. To find string length \n 2. To copy string \n 3. To compare strings \n 4. To concatenate strings\n Enter Option:\n");
scanf("%d",&c);
printf("Enter a string :\n");
scanf("%s",&a);
printf("\nEnter a string:\n");
scanf("%s",& b);
strcpy(*p,a);
strcpy(*q,b);
switch (c)
{
case 1: {
 d=strlen(*p);
 printf("The string length is:%d",d);
 break;
       }
case 2:{
 strcpy(*p,*q);
 printf("copied string is :%s",*p);
 break;
     }
case 3 : {
 x= strcmp(*p,*q);
 if (x!=0)
 printf("NOT SAME");
 else
 printf("SAME");
 break;
      }
case 4: {
 printf("Concatenaed strings :%s", strcat(*p,*q));
 break;
  }
       }
getch();
}