Apagar PC v.1.0

#include <stdio.h>
#include <stdlib.h>

int main()
{
    int s;

    do{
        system("cls");
        printf("Apagar PC 1.0\nAutor: @nRikee93\n\nElige:\n1.Apagar\n2.Cancelar apagado.\n_");
        scanf("%d",&s);
    } while (s==1&&s==2);

    if(s==1){

        do{
            system("cls");
            printf("Apagar PC 1.0\nAutor: @nRikee93\n\nElige el retardo:\n1.Un minuto\n2.Diez minutos\n3.Media hora\n4.Una hora\n5.Dos horas\n6.Cinco horas\n\n_");
            scanf("%d",&s);
        } while(s<1||s>6);

        switch(s)
        {
            case 1: system("shutdown /s /t 60");
                    break;
            case 2: system("shutdown /s /t 600");
                    break;
            case 3: system("shutdown /s /t 1800");
                    break;
            case 4: system("shutdown /s /t 3600");
                    break;
            case 5: system("shutdown /s /t 7200");
                    break;
            case 6: system("shutdown /s /t 18000");
                    break;
        }
    }
    if(s==2){
        system("shutdown /a");
    }
}