how can I extract the mantissa of a double

Question

I would like to store in a variable the mantisssa of a double

I have post a code to get the binary representation of a double : click here

What should I chan

Answer 1

A stringify tokenizing approach:

    #include <string.h>
    #include <stdio.h>

    long double example=(-10000.0/7.0);

    long long ldoubtollmant(long double num)
    { char stackdump1[101]={'\0'};
      char *dump1=&stackdump1[0];
      char stackdump2[101]={'\0'};
      char *dump2=&stackdump2[0];
      snprintf(dump1,100,"%.15Le",num);
      char *next1=dump1;
      next1=strtok(dump1,"e");
      char *next2=NULL;
      strtok_r(next1,".",&next2);
      snprintf(dump2,100,"%s%s",dump1,next2);
      return atoll(dump2);}

    short int ldoubtoshexp(long double num)
    { char stackdump1[101]={'\0'};
      char *dump1=&stackdump1[0];
      snprintf(dump1,100,"%.15Le",num);
      char *next1=NULL;
      strtok_r(dump1,"e",&next1);
      return (short int)atoi(next1);}

    int main(int argc,char *argv[])
    { printf("\n%lld",ldoubtollmant(example));
      printf("\n%hd",ldoubtoshexp(example));}