[Solved] Getting Zeros When Reading A File Full of Numbers [closed]

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There are multiple problems with your code, but:

The problem is the %s at the beginning of the format string. %s matches the complete line and thus contains all values.

Perhaps you can use %c instead, if you are sure, there is only one char before the numbers.

Also notice that you passted a std::string-Pointer to scanf. This is invalid, since scanf needs a char buffer to store a string (%s) which is not a good idea at all, since you don’t know the required length of the buffer.

This works for me:

#include <fstream> 
#include <iostream> 
#include <string>

using namespace std;

int main(int argc, char** argv)
{
  FILE *myfile;
  myfile = fopen("tmp.txt", "r");

  char type;
  float dx;
  float dy;
  float intensity;
  int nsat;
  float rmsy;
  float rmsx;

  // The NULL-if should be here, but left out for shortness
  while ( ! feof (myfile) )
  {
    fscanf(myfile,"%c %f %f %f %i %f %f",&type, &dx, &dy, &intensity, &nsat, &rmsx, &rmsy);
    printf("F %f %f %f %i %f %f\n", dx, dy, intensity, nsat, rmsx, rmsy);
  }
}

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solved Getting Zeros When Reading A File Full of Numbers [closed]