Scanf() fails after getchar() function.

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C

I am trying to write a program where I could dynamically increase the size of a character pointer as the user enters each character into the console. Here is the program where I am attempting this concept: (A dynamically allocated string)

#include<stdio.h>
#include<conio.h>
#include<stdlib.h>
#include<string.h>

struct Structure
{
	char *buf;
	int intvar1, intvar2;
};

char *getdt()
{
	char *chr = (char*)malloc(1);
	int i = 0;
	char ch = getchar();
	while (ch != '\n')
	{
		chr[i] = ch;
		ch = getchar();
		chr = (char *)realloc(chr, (++i) + 1);
	}
	chr[i] = '\0';

	return chr;
}

void main()
{

	int elmts = 0, i = 0;
	Structure * strt;
	scanf("%d", &elmts);

	strt = (Structure*)malloc(sizeof(Structure)*elmts);

	for (i = 0; i < elmts; i++)
	{
		strt[i].buf = getdt();
		scanf("%d", &strt[i].intvar1);
		scanf("%d", &strt[i].intvar2);

	}

	for (i = 0; i < elmts; i++)
	{
		printf("%s %d %f", strt[i].buf, strt[i].intvar1, strt[i].intvar2);
	}


	free(strt);
	getch();

}

[The getdt() function is supposed to get a string from the user.]

The only trouble is with the following fragment:

strt[i].buf = getdt();
		scanf("%d", &strt[i].intvar1);
		scanf("%d", &strt[i].intvar2);

where I am able to retrieve a string properly at strt[i].buf = getdt(), but the successive scanf() 's skips and goes directly to the for-loop beneath.

After some researching I suspect the combination getchar() and scanf() would be the culprit. But I really dont understand what causes the malfunction.

Could any corrections be suggested ?

What I have tried:

This is what I have tried:

for (i = 0; i < n; i++)
{
strt[i].buf = getdt();
char tmp[10],tmp1[10], *tp,*tq;
getss(tmp);
strt[i].intvar1 = strtol(tmp,&tp,10);
gets(tmp1)
strt[i].intvar2 = strtol(tmp1,&tq,10)
}

These efforts were simply in vain.