Description of problem:
There is an example in the C89 standard in the "4.9.6.2 The fscanf function" section, which describes, that %f specifier cannot read "100e", because there is no exponent part after "e"


Version-Release number of selected component (if applicable):
gcc 4.5.1


How reproducible:
#include <stdio.h>

int main(void)
{
    int n;
    float f;
    char c = 'x';
    
    n = scanf("%f%c", &f, &c);
    
    printf("%d %f %d\n", n, f, c);
    return 0;
}
  

Actual results:
[guest@localhost std]$ .ansi t.c -o t
[guest@localhost std]$ ./t
100e
2 100.000000 10
[guest@localhost std]$ alias .ansi
alias .ansi='gcc -ansi -pedantic -Wall'
[guest@localhost std]$


Expected results:
from the standard '/* "100e" fails to match "%f" */'
so scanf() should return EOF


Additional info:
C99 and C11 standards contain the same example