Declaring an array in the middle of program

float *p=NULL
.........

p=malloc(sizeof(float) * num_of_columns);

...............
for(i=0;i<num_of_columns; i++)
{
    printf("%f\n",p[i]);
}
free(p);

 float *q;

..........
q=p;
i=0;
while(i<num_of_columns)
{
     printf("%f\n", q++);
     i++;
}

void somefunc() {
     int foo;
    /* do some stuff here */
    foo = dosomething();

    /* Now we want to declare an array here */
    char array[50]; // This is legal in C++, not in C
    /* do something with array */
}

void somefunc() {
     int foo;
    /* do some stuff here */
    foo = dosomething();

    /* Now we want to declare an array here, so open a new block */
    {
        char array[50]; /* This is legal in C++ and also C, since the variable
                                  is declared at the top of the block */
        /* do something with array */
    }
    /* Do rest of code. array falls out of scope here though */
}