Can someone please help me create a C program that manages the value 0 or 1 once and store it in a variable

Question

Someone can help create a C program that generates the value 0 or 1, once and store it in a variable.

I tried to do it but it didn’t turn out the way I’d hoped:

#include <stdlib.h>
#include <stdio.h>
#include <time.h>
float chuva()
{
    int i;
    float chuva;
    for(i=0 ; i <= 1 ; i++)
    {
    chuva = ( 0 + rand()%1); 
        printf("chuva= %d: %d\n",i, rand());
if(chuva=1)
printf("Choveu\n");
else
printf("Nao choveu\n");
}
}