CODEWITHSUNDEEP
c++stringitoa
thexiv
thexiv

Reputation: 25

How can I get the atoi() function to work on a string?

int p; long unsigned int z;
while (i <= x.length())
{
    const int a = x.length();
    char* b;
    b = x.substr(sizeof(a) - i, 1);
    p = atoi(b);
    z = (z + p + 3) * 3;
    i++;
}

I'm getting:

C:\Users\Anthony\Downloads\pack1.cpp|77|error: cannot convert 'std::basic_string<char>' to 'char*' in assignment|

I'm trying to go down backwards through 'x' and write each ascii code down as I go. The formula at the bottom is a hash. 'x' is a filename. I'll be unhashing it later. I need to run it through atoi().

Please help, as I do not know what to do. Everything else in the program is running fine, but as for this I'm a bit unsettled at the truthiness that this might be impossible. Please help, thank you.

Upvotes: 0

Views: 400

Answers (1)

user3690202
user3690202

Reputation: 4055

int p; long unsigned int z;
while (i <= x.length())
{
  const int a = x.length();
  string b;
  b = x.substr(sizeof(a) - i, 1);
  p = atoi(b.c_str());
  z = (z + p + 3) * 3;
  i++;
}

Upvotes: 2

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