c - 在某个重复字符后从字符串中删除文本

Question

char str[] = "C:\\Users\\test\\Desktop\\folder\\test.txt";
char *ptr;

ptr = strchr(str, '\\');
if (ptr != NULL) {
    *ptr = '\0';
}

如何删除包括 test.txt 在内的最后一个“\”，使其只是“C:\Users\test\Desktop\folder”

谢谢

Answer 1

你想要strrchr

Locate last occurrence of character in stringReturns a pointer to the last occurrence of character in the Cstring str.

The terminating null-character is considered part of the C string.Therefore, it can also be located to retrieve a pointer to the end ofa string.

您还需要使用 \\ 转义反斜杠:

#include <stdio.h>
#include <string.h>
 
int main(void)
{
    char str[] = "C:\\Users\\test\\Desktop\\folder\\test.txt";
    char *ptr;

    ptr = strrchr(str, '\\');
    if (ptr != NULL) {
        *ptr = '\0';
    }
    puts(str);
}