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error: no match for operator
Hey guys! I'm an extremely new c++ programmer. Can you offer suggestions on why I get the "no match for operator" error with the following code? I think it may be that my text file is too big for a string.
#include<iostream>
#include<string>
#include<vector>
#include<cmath>
#include<fstream>
#include<stdlib.h>
using namespace std;
int main(){
string line;
ifstream text( "text.txt" );
getline( text, line );
text.close();
//for( int i = 0; i < line.length(); i++ ){
// cout << line[ i ] << " ";
//}
cout << endl;
string P = "is";
long long int PRIME = atoll("10002949999");
int l_line = line.length(), l_P = P.length(), t=0, h = 1, d = 26, H = 0;
for (int i=1; i < l_P; i++)
h = (h * d) % PRIME;
for (int i=0;i<l_P;i++) {
H = ( (d*H) + P[i] - 'a')%PRIME ;
t = ( (d*t) + line[i] - 'a')%PRIME ;
}
for (int i = 0, j = l_line - l_P - 1 ; i < j ; i++){
if (t == H){
int state = 1;
for (int k = 0 ;k < l_P; k++)
if (line[i+k] != P[k]){
state = -1;
break;
}
if (state == 1 ){
cout << " Match found at index : " << i << "\n";
}
}
else{
t = ( (d * (t - h*(line[i]-'a')) + line[i+l_P] - 'a')%PRIME );
}
}
return 0;
}
Last edited by hollyj; 10-09-2011 at 04:52 PM.
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