StackOverflow2013

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POregarding file i/o in c++
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copied!<p>I have a part of a code that does the following: It reads in sentences from a file in a particular format, puts them in a vector. To probe whether the strings in the vector are stored correctly, I put debugging cout statements. I found that the last string member member of the vector is "". Why is this so? The file I am reading from ends with the last floating point value (that is stored in weight in each iteration). There is no whitespace or \n after that. I am pasting that part of the code in the form of a separate program below.</p> <pre><code>#include <iostream> #include <stdio.h> #include <string> #include <vector> using namespace std; int dist=0; void stringtolower(char *s) { int i=0; char c; while(s[i]!='\0') { c=s[i]; c=tolower(c); s[i]=c; i++; } } void cleanup(char *s) { int i=0; dist=0; while(*(s+i)=='\r' || *(s+i)=='\n' || *(s+i)=='\t') { dist++; i++; } while(*(s+i)!='\0'){ /*if(*(s+i)=='"' || *(s+i)=='`' || *(s+i)=='\'' || *(s+i)=='.') *(s+i)=' ';*/ if(*(s+i)==':' || *(s+i)=='\t' || *(s+i)=='\n' || *(s+i)=='\r' || *(s+i)=='"' || *(s+i)=='`' ){ *(s+i)='\0'; break; } i++; } return; } int isinlist(vector<string> sents, char *s){ for(int i=0;i<sents.size();i++){ if(!sents[i].compare(s)){ return 1; } } return 0; } int main() { char *s=NULL; FILE *fp; fp=fopen("1.txt","r"); size_t len=0; ssize_t read; vector<string> sents; float weight; while(!feof(fp)) { read=getdelim(&s,&len,':',fp); cleanup(s); s=s+dist; fscanf(fp,"%f",&weight); if(isinlist(sents,s)){ continue; } stringtolower(s); string str(s); //sentences.push(str); // Push sentence into FIFO queue for later processing sents.push_back(str); } for(int i=0;i<sents.size();i++) { cout<<sents[i]<<endl; } } </code></pre> <p>Thanks a lot for your help.</p>

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