`#include<stdio.h>`

#include<conio.h>

#include<math.h>

#include<conio.h>

#include<math.h>

#define PI 3.141592

int main()

{

float x, y, r, theta;

clrscr();

printf(“Enter cartesian coordinate x: “);

scanf(“%f”, &x);

printf(“Enter cartesian coordinate y: “);

scanf(“%f”, &y);

/* Calculating r */

r = sqrt(x*x + y*y);

/* Calculating theta in radian */

theta = atan(y/x);

/* Converting theta from degree to radian */

theta = 180.0 * theta/ PI;

printf(“Polar coordinate is: r = %0.2f and theta = %0.2f in degree”, r, theta);

getch(); /* Holds Screen */

return(0);

}

**Output**

Enter cartesian coordinate x: 1 ↲ Enter cartesian coordinate y: 1 ↲ Polar coordinate is: r = 1.41 and theta = 45.00 in degree