How do I take a restriction in C?

text.txt--------
9859                  <-only one number
29 5898 95 9594 

9859 895               <-more than one numbers. Print an error!
29 5898 95 9594

fscanf(fp,"%d",&num);													// here goes the fscanf() command  ?Do I need to use fget()?

int readch = 0;
long int filepos = 0L;
filepos = ftell ( fp); 	// get the file position                                                                   
while ( ( readch = fgetc ( fp)) != EOF) { 
// read each character of the file
    if ( isalpha ( readch)) {
        // check each character to see if it is a letter                                    
        printf ( "File contains letters\n");  // print error message
        fclose ( fp);                         // close file
        getchar();                            // wait for the user to press a key
        return 1;                            // exit the program
    }
}


fseek ( fp, filepos, SEEK_SET); 										// move file position back to where it was after reading num 

if(num < 1 || num > 1000000)
{
    // set restrictions to integer 
    printf("The number must be 1 <= N <= 1.000.000",strerror(errno)); // error with the integer number
    getchar();      // wait the user press a key
    return 0;       // returning an int of 0, exit the program
}

else
{
    // if everything works.....

    int i = 0;         // The compiler creates the integer "int i",  
    int value = 0;     // with the value of "0".
    
    while ( fscanf ( fp, "%d", &value) == 1)
    { 																                                                        
        i++;   // this loop will continue until EOF or non-integer input                                                    
    }
    if ( i > num)   // If the second line of the file has more integers
    // than the first number in the first line says...
    {
        printf ( "too many integers\n");   // ...then will "print" an error.
        getchar();    // wait the user press a key 
        return 1;     // the code will return 1, exit the program
    }
    if ( i < num)
    {
        // If the second line of the file has less integers
        // than the first number in the first line says...
        printf ( "not enough integers\n");    // ...then will "print" an error.
        getchar();
        // wait the user press a key 
        return 1;   // the code will return 1, exit the program
    }
    
    //!here the code will continue if every restrictions was passed!