// find all the numbers in a string

 // using isdigit() , isspace() 

 // finds the "." as well.

 // seperates each number with a return

 // the bool stops needless line returns.

 #include <ctype.h>  // you need this for isdigit() and isspace()

 #include <stdbool.h> // needed for bool

​

int main(){

    char str[30] = " 203.987 This a test 2094";

    bool space = true;

    int i = 0;

    while (i < sizeof(str))

    {

        if (isspace(str[i]) && space)

        {

            printf("\n");

            space = false;

        }

        if ("." == &str[i])

        {

            printf(".");

            space = true;

        }

        if (isdigit(str[i]))

        {

            printf("%c", str[i]);

            space = true;

        }

        i++;

    }

}

isdigit(myChar);