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C programe to find simple and compound interest

#include<stdio.h>
#include<conio.h>
#include<math.h>

void main()
{
    float p,q,r,SI,CI;
    int n;
    clrscr();
   
    printf("Enter the value of Principal p = ");
    scanf("%f \n",&p);
    printf("Enter the value of Rate r = ");
    scanf("%f \n",&r);
    printf("Enter the value of Period n = ");
    scanf("%d \n",&n);
   
    SI = (p*r*n)/100;

    printf("Simple Interest SI=%f \n",SI);
   
    q = 1+(r/100);
    CI=p*pow(q,n);
   
    printf("Compound Interest CI=%f \n",CI);
   
    getch();
}
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Hill Cipher Algorithm Program in C

#include<stdio.h>
#include<conio.h>
void main()
{
int i,j,ans[25][1],sum=0,mtrx[25][25],end;
char txt[25];
clrscr();
printf("\nEnter the string : ");
scanf("%s",txt);
//clrscr();
for(i=0;i<25;i++)
{
if(txt[i]>=97 && txt[i]<122) {}
else
{
end=i;
break;
}
}
for(i=0;i<end;i++)
{
//printf("initial : %d ",txt[i]);
txt[i]=txt[i]-'a';
//printf("final : %d ",txt[i]);
//printf("\n\n");
}
clrscr();
printf("\nEnter matrix...\n");
for(i=0;i<end;i++)
{
for(j=0;j<end;j++)
{
scanf("%d",&mtrx[i][j]);
}
}
for(i=0;i<end;i++)
{
sum=0;
for(j=0;j<end;j++)
{
sum+=mtrx[i][j]*(int)txt[j];
}
ans[i][0]=sum;
}
for(i=0;i<end;i++)
{
printf(" %c",((ans[i][0])%26)+97);
}
getch();
}
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Convert Celsius to Fahrenheit








Insert a number into one of the input fields below:

degrees Celsius

equals

degrees Fahrenheit

Note that the Math.round() method is used, so that the result will be returned as an integer.




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Click To Know Today's Day





Click the button to display todays day of the week.








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How to Display Current Date & Time

<!DOCTYPE html>
<html>
<head>
<script>
function displayDate()
{
document.getElementById("demo").innerHTML=Date();
}
</script>
</head>
<body>

<h1>
Today's date is</h1>
<p id="demo">
</p>

<button type="button" onclick="displayDate()">Display Date</button>

</body>
</html>

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How to display Current Date & Time








Today's date is






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How to remove the default text in textbox when clicked on it

<html><head><title>(Type a title for your page here)</title>

  <script type="text/javascript">
  function make_blank()
  {
  document.form1.type.value ="";
  }
  </script>

  </head>
  <body >

  <form name=form1 method=post action='test.php'>
  <input type=text name=type value='Enter your user id' onClick="make_blank();"></form>

  </body>
  </html>
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