奇怪的strstr行為

Question

我正在嘗試在字符串中找到子字符串的位置。

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

void find_str(char const* str, char const* substr) 
{
    char* pos = strstr(str, substr);
    if(pos) {
        printf("found the string '%s' in '%s' at position: %d\n", substr, str, pos - str);
    } else {
        printf("the string '%s' was not found in '%s'\n", substr, str);
    }
}

int main(int argc, char* argv[]) 
{
    char* str = "gdeasegrfdtyguhıjohhıhugfydsasdrfgthyjkjhghh";
    find_str(str, "hh");
    find_str("dhenhheme    kekekeke hhtttttttttttttttttttttttttttttttttttttttthhtttttttttttt", "hh");

    return 0;
}

輸出：

在'gdeasegrfdtyguhıjohhıhugfydsasdrfgthyjkjhghh'中找到了字符串'hh'，位置：19

在'dhenhheme kekekeke hhttttttttttttttttttttttttttttttttttttttttttttttttthtttttttttttttt'中找到字符串'hh'，位置：4

在第一個例子中，它表示它處於第19位。但是它不應該說是18嗎？ 因為在第二個例子中它表示4.它從子串的開頭開始。

我糊塗了。

Answer 1

字符'ı'不是ASCII字符，因此它可能占用兩個字節。