C Program code to read & display numbers until a negative number is heaved

This C program code reads and displays a number until a negative number is an input. The program flow starts only when a positive number is entered. This is done with a goto statement. Then the program reads and displays positive numbers and the program terminates when a negative number is entered. The do while statement is used here.

PROGRAM CODE

	#include<stdio.h>
	int main()
	{
	int a;
	start:
	printf("Enter a +ve number to start the program: ");
	scanf("%d",&a);
	if(a<0)
	goto start;
	do
	{
	printf("%d",a);
	printf("\tEnter a number: ");
	scanf("%d",&a);
	}
	while(a>=0);
	printf("You entered a -ve number. PROGRAM TERMINATING!!!");
	getch();
	return(0);
	}

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