C program to take input for 3 numbers calculate and print their sum, product and average

Problem In Hand

C program to take input for 3 numbers calculate and print their sum, product and average

The above program can be solved in following ways:

Without using function
Using functions with out passing arguments
Using function by passing arguments

Process and Solution Of Problem

Take input for three number and store them in three variables
calculate and store sum in a variable.
calculate and store product in another variable.
calculate and store average in another variable.
further display sum , product and average

Program/Source Code

Solution without functions

#include <stdio.h>

int main()
{
    float a,b,c,s,p,av;
    printf("Enter 3 number ");
    scanf("%f %f %f",&a,&b,&c);
    s=a+b+c;
    p=a*b*c;
    av=(a+b+c)/3;
    printf("Sum = %f prod = %f  Avg = %f\n",s,p,av);;
    return 0;
}

Output:

Enter 3 number 14
25
63
Sum = 102.000000 prod = 22050.000000 Avg = 34.000000

Solution using functions without arguments

#include <stdio.h>

void avg()
{
    float a,b,c,s,p,av;
    printf("Enter 3 number ");
    scanf("%f %f %f",&a,&b,&c);
    s=a+b+c;
    p=a*b*c;
    av=(a+b+c)/3;
    printf("Sum = %f prod = %f  Avg = %f\n",s,p,av);;
}
int main()
{
    avg();
    return 0;
}

Output:

Enter 3 number 25
96
35
Sum = 156.000000 prod = 84000.000000 Avg = 52.000000

Solution using functions with arguments

#include <stdio.h>

void avg(float a,float b,float c)
{
    float s,p,av;
    s=a+b+c;
    p=a*b*c;
    av=(a+b+c)/3;
    printf("Sum = %f prod = %f  Avg = %f\n",s,p,av);;
}
int main()
{
    float a,b,c;
    printf("Enter 3 number ");
    scanf("%f %f %f",&a,&b,&c);
    avg(a,b,c);
    return 0;
}

Output:

Enter 3 number 74
36
25
Sum = 135.000000 prod = 66600.000000 Avg = 45.000000

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