include stdio int main int double res double slag printf Input scanf f

#include <stdio.h>

int main() {

    int n,k;
    double res=0;
    double slag=1;

    printf("Input N: ");
    scanf("%d", &n);

    for (k = 1; k <= n; ++k) {
        slag*=(-1.)*(n+1)/(n+2);
        printf("%lf \n",slag);
        res+=slag;
    }

    printf("res=%lf \n",res);
}