C/C++ :: Program That Will Print Numbers In Columns From User Input

I tried to work on this program for while, but I am not able to get it to work

Directions:Write a program that reads an integer n from the user.

Display the first 100 numbers, with newlines every n numbers, using % operator

#include <stdio.h>
int main(void){
int a = 0;
int b = 99;
printf("Enter a number: ");
scanf ("%d", &a);

[Code] ....

When I run this code it asks me to enter a number. It doesn't matter what number I enter it gives me the numbers from 1 to 100 in one horizontal line.

I want this program to do something like this:

for example if the user enters n=6 the program should give:

0 1 2 3 4 5 6
7 8 9 10 11 12 13
and so on