Why I am not able to input case 1 when l==0

#include<iostream>
#include<string>
#include<stdio.h>
void main()
{
	using namespace std;
	struct cases
	{
		char str[30];
		int i, j, end;

	};
	cases c[5];
	int n,l;
	cout << "Enter the no. of cases\n";
	cin >> n;
	//now looping to recieve the strings
	for ( l = 0;l < n;l++)
	{
		fgets(c[l].str, 25, stdin);
	//get each string info
		c[l].end = strlen(c[l].str)-2;
		c[l].i = c[l].end;
	}
	//now looping to initiate each process
	for (int l = 0;l < n;l++,cout<<"\n")
	{ 
		
		cout << "case #" << l + 1<<": ";
		//scan the word
		a:
		while ((c[l].str[c[l].i]!= ' ') && (c[l].i>-1))
		{
			c[l].i--;
		}
		for (c[l].j = (c[l].i) + 1;c[l].j <= c[l].end; c[l].j++)
		{
			cout << c[l].str[c[l].j];
		}
		cout << " ";
		(c[l].i)--;
		c[l].end = (c[l].i);
		if (c[l].i != -2)
			goto a;

	}





	system("pause");
}