OJ Board

I cant understand. why submission error?

#include <stdio.h>

int printing(int x)
{
int i;
for ( i = 0; i < x; i++)
printf("%d",x);

printf("\n");

return 0;
}

int main()
{

int tst_cas, f, w, i, j, triger =0 ; // w for Amplitude, f for Frequency

scanf("%d", &tst_cas);

while( tst_cas ...