why are my scanf statements not working?

Question

I am a beginner but I have been working on this code for a week now and I cannot get my scanf functions to work. All of my printf functions output just fine but if I go to input my information to test my code I do not get anything. Am I missing something simple here?

#include <stdio.h>
float average(float a[]);
int main ()
{
    /* variable definition: */
    char personsName[100];
    char personsAge[3];
    char personsState[20];
    float Age, Texas;
    int people,age,i,count,Avg,None;
    // Loop through 50 people
    for (people=0; people <2 ; people++)
    {

        Age =0.0;
        printf("Enter Persons Name \n");
        scanf("%s", personsName);
        printf("Enter None if this is last family member. \n");
        scanf("%s", personsName);
        {
            if (personsName == None)
                break;
        }
    }
    {
        printf("Enter Persons Age \n");
        scanf("%s", personsAge);
        float average(float a[])
        {
            printf("Average of all family members is %f \n");
            int i;
            float avg, sum=0.0;
            for(i=0;i<50;++i)
                sum+=a[i];
            avg =(sum/i);

            return avg;
        }
    }
    {
        printf("Enter Persons State \n");
        scanf("%s", personsState);
        while (Texas > 0)
        {
            printf("Enter Texas\n");
            scanf("%f",&Texas);
            //Only assign if positive
            if (Texas > 0)
            {
                personsState[count]=Texas;
                count = count + 1;
                break;
            }
        }
    }
    // Print data
    for (i=0; i<count;i++)
    {
        printf ("Texas %f is %d\n", i,personsState[i]);
        if (count == 50)
            break;
    }

    return 0;
}

Answer 1

The issue, as I see it is with

if (personsName == None)

This is not the way to compare two string. You need to use strcmp() to compare the contents.

Also, the two successive scanf()s has same argument to store the input. The second scanf() will overwrite the previously taken input.

FWIW, None is not a string, however. You need to use "None" to denote a string.

That said, uncontrolled input through scanf() can lead to buffer overflows. Better to limit your scanning with the length specifier, like

 scanf("%99s", personsName);

and so on.