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#include <stdio.h>
void main() {
	int i,j,k,t=0;
	clrscr();
	for (i=1; i<=5; i++) {
		for (k=t; k<5; k++) {
			printf(" ");
		}
		for (j=0; j< i; j++) {
			printf(" * ");
			t = t + 1;
		}
		printf("\n");
	}
	getch();
}

prog.c:3:6: warning: return type of ‘main’ is not ‘int’ [-Wmain]
 void main() {
      ^~~~
prog.c: In function ‘main’:
prog.c:5:2: warning: implicit declaration of function ‘clrscr’ [-Wimplicit-function-declaration]
  clrscr();
  ^~~~~~
prog.c:16:2: warning: implicit declaration of function ‘getch’ [-Wimplicit-function-declaration]
  getch();
  ^~~~~
/home/IbVkjK/ccXPq4og.o: In function `main':
prog.c:(.text.startup+0x1c): undefined reference to `clrscr'
prog.c:(.text.startup+0x7b): undefined reference to `getch'
collect2: error: ld returned 1 exit status

Standard output is empty