scanf problem

[jerrysmith]

The function is to ask the user to enter floating point numbers into an array one by one.
Eg. x(0)=1, x(1)=2, x(2)=3....
After a user enters the last known x(t), how do i terminate the for loop given that the user returns with a blank line.

#include <stdio.h>

#define MAX 100

float x [MAX];

main()
{

register int t;

for(t=0;t<MAX;t++)
{

printf("Please enter x(%d):",t);

scanf("%f%c",&x[t],);

printf("x(%d)=%f\n",t,x[t]);

/*PROBLEM HERE: how to terminate the for loop, if a blank line is returned? using break?*/

}

}

[Prelude]

If scanf fails, bail from the loop using break. As an alternative you could use scanf as the loop condition, or avoid scanf altogether using and fgets/sscanf combo:

#include <stdio.h>

#define MAX 100

int main ( void )
{
  float x[MAX];
  int   t;

  for ( t = 0; t < MAX; t++ ) {
    if ( scanf ( " %f", &x[t] ) != 1 )
      break;
    printf ( "x(%d)=%f\n", t, x[t] );
  }

  return 0;
}