Linux string 中文

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

int main() {
    char str[] = "你好，世界！";
    printf("字符串长度: %zu\n", strlen(str));
    return 0;
}

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

int main() {
    char str[] = "你好，世界！";
    iconv_t cd = iconv_open("GBK", "UTF-8");
    if (cd == (iconv_t)-1) {
        perror("iconv_open");
        return 1;
    }

    char *inbuf = str;
    size_t inbytesleft = strlen(str);
    size_t outbytesleft = inbytesleft * 2; // 足够大的缓冲区
    char *outbuf = malloc(outbytesleft);
    char *outptr = outbuf;

    if (iconv(cd, &inbuf, &inbytesleft, &outptr, &outbytesleft) == (size_t)-1) {
        perror("iconv");
        free(outbuf);
        return 1;
    }

    *outptr = '\0';
    printf("转换后的字符串: %s\n", outbuf);
    free(outbuf);
    iconv_close(cd);
    return 0;
}

int utf8_strlen(const char *str) {
    int len = 0;
    while (*str) {
        if ((*str & 0xC0) != 0x80) len++;
        str++;
    }
    return len;
}