print (1-100)

#include<stdio.h>
int number_1(x);
int number_2(y);
int main()
{
    int a=1;
    number_1(a);
    return 0;
}
int number_1(x)
{
    int z=x;
    printf("%d\t",z);
    z=z+1;
    if(z<=100)
    number_2(z);
    return 0;

}
int number_2(y)
{
    int z=y;
    printf("%d\t",z);
    z=z+1;
    if(z<=100)
    number_1(z);
    return 0;
}