scanf - fscanf usage in C -
i have file this:
10 15 i want read tree variables, let's number1, number2, , mystring. have doubts kind of pattern give fscanf. thinking this;
fscanf(fp,"%i %i\n%s",number1,number2,mystring); should work, , also, correct way of reading file? if not, suggest?
read each line fgets (or getline if have it), split line strsep (better, if available) or strtok_r (more awkward api more portable), , use strtoul convert strings numbers necessary.
*scanf should never used, because:
- some format strings (e.g. bare
"%s") eager overflow buffersgetsis. - behavior on integer overflow undefined -- invalid input can potentially crash program.
- they not report character position of first scan error, making nigh-impossible recover parse error. (this can mitigated using
fgets,sscanfinstead offscanf.)
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