20 lines
437 B
C
20 lines
437 B
C
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// 设计函数my_strlen(char *str)，返回str字符串的长度
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#include <stdio.h>
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int my_strlen(char *str);
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int main(void)
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{
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char str[] = "hello world";
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printf("len = %d\n", my_strlen(str));
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return 0;
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}
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int my_strlen(char *str)
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{
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int len = 0;
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while (*str++) // 当指针指向的值为 0 (ASCII 为空字符串，判断字符串结束)时，表示已经到达字符串的末尾
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len++;
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return len;
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}
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