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/*
* Returns a real number
*/
#include "defn.h"
#define ERROR "Two or more decimal places in a number"
float
getval()
{
char valbuf[10];
float value;
int DECIMAL = 0;
int i;
/* Null the value buffer "valbuf" */
for (i = 0; i < 10; i++)
valbuf[i] = NULL;
i = 0;
ch = getc(stream);
while ((ch == ' ') || (ch == ','))
ch = getc(stream);
while ((ch >= '0' && ch <= '9') || ch == '.' || ch == '-' || ch == '+')
{
if (ch == '.')
{
if (DECIMAL)
{
fprintf(stderr,"Error: %s\n", ERROR);
exit(1);
}
DECIMAL = 1;
}
valbuf[i++] = ch;
ch = getc(stream);
}
ungetc(ch, stream); /* Put non numeric char back */
value = atof (valbuf);
return (value);
}
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