C Program To Calculate Average Of four Integer

 it is a single number that is used to represent a collection of numbers.                    

Average =Sum/Count

#include<stdio.h>

int main()

{

int a,b,c,d;

float avg;

printf("Enter four numbers:\n");

scanf("%d%d%d%d",&a,&b,&c,&d);

avg=(a+b+c+d)/4.0;                 //4.0 is for type casting

printf("Average=%f\n",avg);

}

OUTPUT:

Enter four numbers:

25

65

45

88

Average=55.750000

Program to calculate area and perimeter of rectangle, sqare and circle using C language

 
         
       

Shape	Area	Perimeter
Rectangle	Length x width	2*(length+width)
Square	Side x side	Side x 4
Circle	πr2	2πr

#include <stdio.h>

int main()

{

int length,width,side;

float radius,pi=3.14;

int a_rect,p_rect,a_sq,p_sq;

float a_cir,p_cir;

printf("Enter length and width for rectangle\n");

scanf("%d%d",&length,&width);

printf("Enter sides of the square\n");

scanf("%d",&side);

printf("Enter radius of the circle\n");

scanf("%f",&radius);

a_rect=length*width;

p_rect=2*(length+width);

a_sq=side*side;

p_sq=4*side;

a_cir=pi*radius*radius;

p_cir=2*pi*radius;

printf("For rectangle:Area=%d, Perimeter.=%d\n",a_rect,p_rect);

printf("For square:Area=%d, Perimeter=%d\n",a_sq,p_sq);

printf("For circle:Area=%f, Perimeter=%f\n",a_cir,p_cir);

}

OUTPUT:
Enter length and width for rectangle
18 15
Enter sides of the square
12
Enter a radius of the circle
6.5
For rectangle:Area=270, Perimeter.=66
For square:Area=144, Perimeter=48

For circle:Area=132.664993, Perimeter=40.820000

C program to calculate simple interest

       Simple interest is a method of calculating interest charged on fixed deposit

    Formula  i=(Ptr/100)

    Where i:Interese

               p:Principal

               t:time period

               r:rate of interest/year

    #include <stdio.h>

    int main()

    {

    int principal,time;

    float r,i;

    printf("input principal amount\n");

    scanf("%d",&principal);

    printf("input time (in year)\n");

    scanf("%d",&time);

    printf("input the rate of interest\n");

    scanf("%f",&r);

    i=(principal*time*r)/100;

    printf("Total interest %f\n",i);

    }

  OUTPUT:

     input principal amount

    10000

     input time (in year)

     4

     input the rate of interest

     7.5

     total interest 3000.000000