Constants
#include <stdio.h>
main()
{
const int x = 20;
const float PI = 3.14;
printf("\nConstant values are %d and %.2f\n", x, PI);
}Constant values are 20 and 3.14
Constants and Variables with macro
#include <stdio.h>
#define SPEED 55
int main()
{
printf("SPEED %i.\n",SPEED);
printf("SPEED+15 %i.\n",SPEED+15);
printf(" %i MPH sign?\n",SPEED);
return(0);
}SPEED 55.
SPEED+15 70.
55 MPH sign?
Define constant float value using const
#include <stdio.h>
int main(void)
{
float diameter = 0.0f;
float radius = 0.0f;
const float Pi = 3.14159f;
printf("Input the diameter of the table:");
scanf("%f", &diameter);
radius = diameter/2.0f;
printf("\nThe circumference is %.2f", 2.0f*Pi*radius);
printf("\nThe area is %.2f", Pi*radius*radius);
return 0;
}Input the diameter of the table:123
The circumference is 386.42
The area is 11882.28
