.text
.global main
.extern printf
.extern scanf

main:
        push {lr}
        ldr r0, =scanf_lit
        ldr r1, =num_a
        ldr r2, =num_b
        bl scanf             // scanf("%d %d", &num_a, &num_b);
        ldr r0, =printf_lit
        ldr r1, =num_a
        ldr r1, [r1]
        ldr r2, =num_b
        ldr r2, [r2]
        add r1, r1, r2
        bl printf            // printf("%d\n", num_a + num_b);
        pop {pc}

.data
scanf_lit:      .asciz "%d %d"
printf_lit:     .asciz "%d\n"
.align 4
.bss
num_a:  .skip 4
num_b:  .skip 4