How could the user enter the following data only on a line not as in the code and validate it?

do{
    do{
        printf("Punto 1 A\n"); //X1
            scanf("%d",&a1);
            if(a1<0 || a1>10000)
            {
                printf("\nError el Numero Debe ser mayor a 0 y menor a 10.000\n");
            }
    }while(a1<0 || a1>10000);

    do{
        printf("Punto 2 A\n"); // Y1
            scanf("%d",&a2);
            if(a2<0 || a2>10000)
            {
                printf("Error el Numero Debe ser mayor a 0 y menor a 10.000\n");
            }
    }while(a2<0 || a2>10000);

    do{
        printf("Punto 1 B\n"); //X2
            scanf("%d",&b1);
            if(b1<0 || b1>10000)
            {
                printf("Error el Numero Debe ser mayor a 0 y menor a 10.000\n");
            }
    }while(b1<0 || b1>10000);

    do{
        printf("Punto 2 B\n"); //Y2
            scanf("%d",&b2);
            if(b2<0 || b2>10000)
            {
                printf("Error el Numero Debe ser mayor a 0 y menor a 10.000\n"); 
            }
    }while(b2<0 || b2>10000);