Question

You are to write a C program that will read from a file, one or more sets of x,y coordinates. Each set of coordinates is part of a Cartesian system. A Cartesian coordinate system is a system that specifies each point uniquely in a plane by a pair of numerical coordinates. Your program will determine which quadrant each set belong. - Quadrants are often numbered 1st - 4th and denoted by Roman numerals: I(+,+), II (−,+), III (−,−), and IV (+,−).

Your program should contain a function that determines and returns which quadrant the x and y coordinate would be in.

Listed below are a few of the steps you will need to take for this program:

Use a C File Pointer (FILE*). The file you will need to open will be defined using a command line argument. You will need to open the file for reading.

You will use fscanf to read each set of coordinates. Once you have read a set of coordinates call the function you wrote to determine the quadrant it belongs in and print the appropriate output.

Below is an example input file.

-1 2

1 2

2 -1

-1 -2

Based on this input file the output would be as follows:

X and Y are in Quadrant II

X and Y are in Quadrant I

X and Y are in Quadrant IV

X and Y are in Quadrant III

Answer 1

Solution:

#include <stdio.h>

int main()

{

int x, y;

printf("Input the Coordinate(x,y): ");

printf("\nx: ");

scanf("%d", &x);

printf("y: ");

scanf("%d", &y);

if(x > 0 && y > 0)

{

printf("Quadrant-I(+,+)\n");

}

else if(x> 0 && y < 0)

{

printf("Quadrant-II(+,-)\n");

}

else if(x < 0 && y < 0)

{ printf("Quadrant-III(-,-)\n");

}

else if(x < 0 && y > 0)

{

printf("Quadrant-IV(-,+)\n");

}

return 0;

}