Question

我是C的新手，我应该创建strtok函数。问题是，我在这段代码中不断收到分段错误错误：

char *newstring = "testing, testing, tested."
while(*newstring != '\0' ){
    /*replace delimiters with nulls*/
    printf("STARTING ITERATION\n");
    if(*newstring ==','){
        *newstring='\0';
    }

    printf("newstring char in loop: %c\n", *newstring);
    /*printf("delimiters char in loop: %c\n", *delimiters);*/
    newstring++;
    printf("END OF ITERATION\n");
}
printf("OUT OF ITERATION");

因此输出：

STARTING ITERATION
newstring char in loop: t
END OF ITERATION
STARTING ITERATION
newstring char in loop: e
END OF ITERATION
STARTING ITERATION
newstring char in loop: s
END OF ITERATION
STARTING ITERATION
newstring char in loop: t
END OF ITERATION
STARTING ITERATION
newstring char in loop:
END OF ITERATION
STARTING ITERATION
newstring char in loop: t
END OF ITERATION
STARTING ITERATION
newstring char in loop: e
END OF ITERATION
STARTING ITERATION
newstring char in loop: s
END OF ITERATION
STARTING ITERATION
newstring char in loop: t
END OF ITERATION
STARTING ITERATION
newstring char in loop:
END OF ITERATION
STARTING ITERATION
newstring char in loop: t
END OF ITERATION
STARTING ITERATION
newstring char in loop: e
END OF ITERATION
STARTING ITERATION
newstring char in loop: s
END OF ITERATION
STARTING ITERATION
newstring char in loop: .
END OF ITERATION
Segmentation fault (core dumped)

所以，看起来它一直到字符串的结尾和循环的结尾，但实际上并没有使它成为循环的结果。我不确定我错过了什么。

Answer 1

您正在尝试修改C中不允许的字符串文字。如果您将char *newstring = "testing, testing, tested."更改为char newstring[] = "testing, testing, tested."，那么您正在修改数组的内容。

迭代字符串时C中的分段错误

1 个答案: