求助：C函数字符串反转

[bb神猪]

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

int main()
{
char *string = "abcdef";
char tmp;
int len = strlen(string),i = 0;

printf("string before reverse:%s.\n",string);
for(i = 0;i <= len/2;i++){
tmp = *(string+i);
printf("1\n");
*(string+i) = *(string+len-i-1); //出现段错误
printf("2\n");
*(string+len-i-1) = tmp;
}

printf("string after reverse:%s.\n",string);

return 0;

}


请问下为什么在上面注释那段会出现段错误。

[wang0635]

char *string = "abcdef"; 改成 char string[] = "abcdef";

[wang0635]

有的系统把字符串常量存到设置为只读属性的内存段中