Thread: Double Data Type

I am new to the C programming language, so, bare with me.

Everytime I run this code I get a whole number and not a decimal number.

Am I missing something?

Code:

#include <stdio.h>

main()
{

	double  pi;


        printf("Enter the value of PI:");
	scanf("%d", &pi);

	printf("Pi is %d\n", pi);
	fflush(stdin);
	getchar();
}

becase you dont print it in a right format. use this

Code:

#include <stdio.h>

int main()
{
    double pi;
    int ch;
    
    printf("Enter the value of PI:");
    scanf("&#37;lf", &pi);

    printf("Pi is %lf\n", pi);
    
    while((ch=getchar()) != '\n' && ch != EOF);
    
    getchar();    
    return 0;
}

And dont use fflush(stdin) seeFAQ

ssharish2005

I wouldn't recommend using %lf to print out a double; it's valid in C99 but is not defined in C89. %f works for printing doubles in both C89 and C99 and thus will be more portable.

%lf is still correct for doubles and scanf(), however.