Question

How to extract the decimal part from a floating point string in C

Answer 1

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

int main(void)
{
    char* str = "965.847209";
    char* endptr;

    char* pointpos = strchr(str, '.');
    
    // double strtod(const char *str, char **endptr)
    
    long decimalpart = strtod(pointpos + 1, &endptr);
    long intpart = strtod(str, &endptr);

    printf("intpart: %d\n", intpart);
    printf("decimalpart: %d", decimalpart);
       
    return 0;
}
    
     
     
     
/*
run:
  
intpart: 965 
decimalpart: 847209
 
*/

 

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