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

int main(void ) {

int a;
char *p;

for (i=0; i<1000; i++) {
p = malloc(10240);
printf("hi %d\n", i);
}

 return 0;
}

In function 'main':
Line 9: error: 'i' undeclared (first use in this function)
Line 9: error: (Each undeclared identifier is reported only once
Line 9: error: for each function it appears in.)