error expected Primary-Expression before ' ' token

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Error on line 21.

#ifndef __STRING_H__
#define __STRING_H__

#pragma warning(disable: 4786)
#include <string>
#include <vector>

const int MAX_RESP = 4;

typedef std::vector<std::string> vstring;


bool isPunc(char c);
void cleanString( std::string &str );
void UpperCase( std::string &str );
void copy(char *array[], vstring &v);

template<typename T>
void shuffle(T &array, size_t size) {
    for(int i = 0; i < size; ++i) {
        int index =() % size;
        std::swap(array[i], array[index]);
    }
}

#endif
c++ operators syntax
  • 4

    It’s your second question, and they’re both typos. It would be good to pay more attention or start doing simpler things until you get more used to the language and errors presented.

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1 answer

1

I believe it was just a typo, since the operator % You need to have two operands, you only have one. Parentheses are there without meaning. Maybe the intention was to put an expression in there and its result be used as first operand. Or maybe it’s something simpler. I switched the () by the variable i and compiled, I don’t know if it was the intention:

#include <string>

template<typename T>
void shuffle(T &array, size_t size) {
    for (int i = 0; i < size; ++i) {
        int index = i % size;
        std::swap(array[i], array[index]);
    }
}
int main() {}

Behold working in the ideone. And in the repl it.. Also put on the Github for future reference.

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