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C programme to find simple and compound interest

Write a C program to calculate 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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