[prev] [index] [next]

Code details (cont)

Be careful with side-effects in expressions, e.g. 

str[i++] = str[i++] = ' ';

... is unsafe ... use instead ...

str[i++] = ' '; str[i++] = ' ';

res = i++ - i++;

... is unsafe ... use instead ...

i1 = i++;  i2 = i++;  res = i1 - i2;

(C does not define order of evaluation of subexpressions)