在C中将字符串更改为int时溢出

#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <limits.h>

int main() {
    char str[] = "2147483648"; // 这个数超出了int的最大值
    char *endptr;
    long val;

    errno = 0;    // To distinguish success/failure after call
    val = strtol(str, &endptr, 10);

    // Check for various possible errors
    if ((errno == ERANGE && (val == LONG_MAX || val == LONG_MIN))
           || (errno != 0 && val == 0)) {
        perror("strtol");
        return EXIT_FAILURE;
    }

    if (endptr == str) {
        fprintf(stderr, "No digits were found\n");
        return EXIT_FAILURE;
    }

    // If we got here, strtol() successfully parsed a number
    if (*endptr != '\0') {    // Not necessarily an error
        fprintf(stderr, "Further characters after number: %s\n", endptr);
    }

    printf("strtol() returned %ld\n", val);

    return EXIT_SUCCESS;
}