1 <assertions> 2 <assertion id="1" tag="ref:XSH6:8201:8202 pt:CX"> 3 The difftime ( ) function shall compute the difference between two calendar times 4 (as returned by 5 time( )): time1. time0. 6 </assertion> 7 <assertion id="2" tag="ref:XSH6:8204:8204 pt:CX"> 8 The difftime ( ) function shall return the difference expressed in seconds as a type double. 9 </assertion> 10 </assertions> 11 12