Separate a string with characters, spaces and integers into string and integer in C-CodePudding

I am looking for a way to separate a string into a string and integer at the last space in C

"121 212 27387" into "121 212" and 27387
"pur ple 16091" into "pur ple" and 16091
"98!=76 54321 22143" into "98!=76 54321" and 22143

the integer can be extracted with atoi(strrchr()), but I don't know how the string can be extracted, sscanf won't work, because it stops at the first space

CodePudding user response：

You just have to locate the last occurrence of the space. Assign a pointer to the address. From there you can convert the number to an integer and you can copy the string to a new variable.

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

int main() {
    char substring[32];
    char string[] = "121 212 27387";
    char *p = strrchr(string, ' ');
    size_t distance = p - &string[0];
    int num = atoi(p);
    
    strncpy(substring, string, distance);
    
    printf("num = %d\n", num);
    printf("distance = %d\n", distance);
    printf("substring = %s\n", substring);
    
    return 0;
}