C
x
34
1
2
3
4
int seq(int x)5
{6
printf("out if x = %d \n",x);7
if(x<=4)8
{9
printf("x in if x = %d \n",x);10
return x;11
}12
else13
{14
printf("x out else = %d \n",x);15
return seq(x-4)+2*seq(x-3)+3*seq(x-2)+4*seq(x-1);16
}17
18
}19
20
int main()21
{22
int x,result;23
24
printf("Inform N: ");25
scanf("%d",&x);26
27
result = seq(x);28
29
30
printf("\n An = %d \n",result);31
32
return 0;33
}34
$ gcc prog.c -Wall -Wextra -std=gnu11
Stdin
5
Start
Inform N: out if x = 5 x out else = 5 out if x = 1 x in if x = 1 out if x = 2 x in if x = 2 out if x = 3 x in if x = 3 out if x = 4 x in if x = 4 An = 30
0
Finish