c - C语言中如何获取字符串的字符索引？

Question

如何获取当前字符索引(C 语言)？

char *s = "abcdefghijklmopqrstuvwxyz";
*s++;
*s++;
*s++;
printf("%c\n", *s);    // print character 'd'
printf("%d\n", s - *s);    // should print 3, but not working

我希望获得索引 (3)，但如何以编程方式对其进行编码？

Answer 1

char *s = "abcdefghijklmopqrstuvwxyz";
char *t = s;
*s++;
*s++;
*s++;
printf("%c\n", *s);    // print character 'd'
printf("%d\n", s - t);    // print 3

应该这样做。