gistfile1.c

#include <stdio.h>

void hoge(char *str) {
    str[1] = 'a';
}

int main(void) {
    char foo[10];
    char b[] = {0xe3,0x81,0xa0,0xe3,0x81,0xbe,0xe3,0x81,0xa3,0xe3,0x81,0xa6,0xe3,0x82,0xb3,0xe3,0x83,0xbc,0xe3,0x83,0x89,0xe3,0x82,0x92,0xe3,0x81,0x8b,0xe3,0x81,0x91,0xe3,0x82,0x88,0x00};
    strcpy(foo, "hoge");
    hoge(foo);
    printf("%s %s\n", b, foo);
}