可以在C中更改字符集编码吗？

size_t iconv(iconv_t cd, char **inbuf, size_t *inbytesleft, char **outbuf, size_t *outbytesleft);

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

int main() {
    char *utf8_str = "Hello, 世界!";
    char ascii_str[100];
    
    iconv_t cd = iconv_open("ASCII", "UTF-8");
    if (cd == (iconv_t)-1) {
        perror("iconv_open");
        return 1;
    }
    
    char *inbuf = utf8_str;
    size_t inbytesleft = strlen(utf8_str);
    char *outbuf = ascii_str;
    size_t outbytesleft = sizeof(ascii_str);
    
    if (iconv(cd, &inbuf, &inbytesleft, &outbuf, &outbytesleft) == (size_t)-1) {
        perror("iconv");
        return 1;
    }
    
    iconv_close(cd);
    
    printf("ASCII string: %s\n", ascii_str);
    
    return 0;
}