Can you write a program in c that will allow the user to input ten numbers and display the total number of positive and negative numbers entered?

Answer 1

It's not pretty (because I've never written anything in C before but it worked nonetheless) but here you go. I compiled with Microsoft Visual C++ 2010 Express with a Win32 Console Application and this is everything that was written. It worked but looks kind of bulky. Tweak to your heart's content. I wasn't 100% sure what you wanted so I made three versions that do basically the same thing with slight alterations. I learned to code in C for you...

This one lists each one that was either positive or negative.

// snfp.cpp : Defines the entry point for the console application.

//

#include "stdafx.h"

#include "stdio.h"

int

main (void)

{

/* declarations */

double x0=0, x1=0, x2=0, x3=0, x4=0, x5=0, x6=0, x7=0, x8=0, x9=0, y0=0, y1=0, y2=0, y3=0, y4=0, y5=0, y6=0, y7=0, y8=0, y9=0, z0=0, z1=0, z2=0, z3=0, z4=0, z5=0, z6=0, z7=0, z8=0, z9=0;

/* executable statements */

printf ("Enter ten real numbers: ");

scanf ("%lf %lf %lf %lf %lf %lf %lf %lf %lf %lf", &x0, &x1, &x2, &x3, &x4, &x5, &x6, &x7, &x8, &x9);

if(x0<0){ y0 = x0;}

if(x0>0){ z0 = x0;}

if(x1<0){ y1 = x1;}

if(x1>0){ z1 = x1;}

if(x2<0){ y2 = x2;}

if(x2>0){ z2 = x2;}

if(x3<0){ y3 = x3;}

if(x3>0){ z3 = x3;}

if(x4<0){ y4 = x4;}

if(x4>0){ z4 = x4;}

if(x5<0){ y5 = x5;}

if(x5>0){ z5 = x5;}

if(x6<0){ y6 = x6;}

if(x6>0){ z6 = x6;}

if(x7<0){ y7 = x7;}

if(x7>0){ z7 = x7;}

if(x8<0){ y8 = x8;}

if(x8>0){ z8 = x8;}

if(x9<0){ y9 = x9;}

if(x9>0){ z9 = x9;}

printf ("\nThe negative numbers are %lf %lf %lf %lf %lf %lf %lf %lf %lf %lf.\n", y0, y1, y2, y3, y4, y5, y6, y7, y8, y9);

printf ("\nThe positive number are %lf %lf %lf %lf %lf %lf %lf %lf %lf %lf.\n", z0, z1, z2, z3, z4, z5, z6, z7, z8, z9);

printf ("Type something to exit");

scanf ("%lf", &x0);

return (0);

}

This one tells you how many were positive and how many were negative.

// snfp.cpp : Defines the entry point for the console application.

//

#include "stdafx.h"

#include "stdio.h"

int

main (void)

{

/* declarations */

double x0=0, x1=0, x2=0, x3=0, x4=0, x5=0, x6=0, x7=0, x8=0, x9=0, y0=0, y1=0, y2=0, y3=0, y4=0, y5=0, y6=0, y7=0, y8=0, y9=0, z0=0, z1=0, z2=0, z3=0, z4=0, z5=0, z6=0, z7=0, z8=0, z9=0, neg=0, pos=0;

/* executable statements */

printf ("Enter ten real numbers: ");

scanf ("%lf %lf %lf %lf %lf %lf %lf %lf %lf %lf", &x0, &x1, &x2, &x3, &x4, &x5, &x6, &x7, &x8, &x9);

if(x0<0){ y0 = 1;}

if(x0>0){ z0 = 1;}

if(x1<0){ y1 = 1;}

if(x1>0){ z1 = 1;}

if(x2<0){ y2 = 1;}

if(x2>0){ z2 = 1;}

if(x3<0){ y3 = 1;}

if(x3>0){ z3 = 1;}

if(x4<0){ y4 = 1;}

if(x4>0){ z4 = 1;}

if(x5<0){ y5 = 1;}

if(x5>0){ z5 = 1;}

if(x6<0){ y6 = 1;}

if(x6>0){ z6 = 1;}

if(x7<0){ y7 = 1;}

if(x7>0){ z7 = 1;}

if(x8<0){ y8 = 1;}

if(x8>0){ z8 = 1;}

if(x9<0){ y9 = 1;}

if(x9>0){ z9 = 1;}

neg = y0 + y1 + y2 + y3 + y4 + y5 + y6 + y7 + y8 + y9;

pos = z0 + z1 + z2 + z3 + z4 + z5 + z6 + z7 + z8 + z9;

printf ("\nThere are %lf negative numbers.\n", neg);

printf ("\nThere are %lf positive numbers.\n", pos);

printf ("Type something to exit");

scanf ("%lf", &x0);

return (0);

}

This one sums the positive and then sums the negative.

// snfp.cpp : Defines the entry point for the console application.

//

#include "stdafx.h"

#include "stdio.h"

int

main (void)

{

/* declarations */

double x0=0, x1=0, x2=0, x3=0, x4=0, x5=0, x6=0, x7=0, x8=0, x9=0, y0=0, y1=0, y2=0, y3=0, y4=0, y5=0, y6=0, y7=0, y8=0, y9=0, z0=0, z1=0, z2=0, z3=0, z4=0, z5=0, z6=0, z7=0, z8=0, z9=0, neg=0, pos=0;

/* executable statements */

printf ("Enter ten real numbers: ");

scanf ("%lf %lf %lf %lf %lf %lf %lf %lf %lf %lf", &x0, &x1, &x2, &x3, &x4, &x5, &x6, &x7, &x8, &x9);

if(x0<0){ y0 = x0;}

if(x0>0){ z0 = x0;}

if(x1<0){ y1 = x1;}

if(x1>0){ z1 = x1;}

if(x2<0){ y2 = x2;}

if(x2>0){ z2 = x2;}

if(x3<0){ y3 = x3;}

if(x3>0){ z3 = x3;}

if(x4<0){ y4 = x4;}

if(x4>0){ z4 = x4;}

if(x5<0){ y5 = x5;}

if(x5>0){ z5 = x5;}

if(x6<0){ y6 = x6;}

if(x6>0){ z6 = x6;}

if(x7<0){ y7 = x7;}

if(x7>0){ z7 = x7;}

if(x8<0){ y8 = x8;}

if(x8>0){ z8 = x8;}

if(x9<0){ y9 = x9;}

if(x9>0){ z9 = x9;}

neg = y0 + y1 + y2 + y3 + y4 + y5 + y6 + y7 + y8 + y9;

pos = z0 + z1 + z2 + z3 + z4 + z5 + z6 + z7 + z8 + z9;

printf ("\nThe negative numbers add up to %lf.\n", neg);

printf ("\nThe positive number add up to %lf.\n", pos);

printf ("Type something to exit");

scanf ("%lf", &x0);

return (0);

}