Program to calculate simple interest in C

/*calculation of simple interest*/


#include<stdio.h>  

/*#include is a preprocessor directive and #include<stdio.h> is a declaration for printf() function*/


int main()            

 /*main() is a function or a cointainer for a set of statements*/


{

int p,n;       /*declaration*/

float r,si;    /*declaration*/

p=50000;        //p=principal

n=10;             //n=number of years

r=2500;         //r=rate


   si=p*n*r/100;    //using formula for simple interest

   

   printf("%f\n",si); 

/*printf() displays output on the screen, %f is used to print real value, and \n takes cursor to next line*/


   return 0;       

/*as we are using int before main(), it return a value 0*/  

}


In the above program, Every time we run the program we would get the same output but if you want to supply the values of p, r, and n through the keyboard during the execution, you need to use a function scanf( ).


 


/*calculation of simple interest, taking values from user*/


#include<stdio.h>  

/*#include is a preprocessor directive and #include<stdio.h> is a declaration for printf() function*/


int main()        

 /*main() is a function or a cointainer for a set of statements*/

{

int p,n;       /*declaration*/

float r,si;    /*declaration*/

printf("input values of p,n,r"); 

scanf("%d%d%f",&p,&n,&r); 

 

//&(ampersand) is an address of operator, when we use &p we are telling scanf()at which memory location should it store the value.


   si=p*n*r/100;  //using formula for simple interest

   

   printf("%f\n",si); 

//printf() displays output on the screen, %f is used to print real value, and \n takes cursor to next line.

   return 0;       

//as we are using int before main(), it return a value 0  

}

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