#include <stdio.h> #include <string.h> int main(void) { char *name[]={ "Illegal day", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"}; printf("hos = %s \n", name[0]); printf("hos = %s \n", name[1]); printf("hos = %s \n", name[3]); strncpy(name[0],"Illegal",7); printf("host = %s \n", name[0]); printf("host = %s \n", name[1]); printf("host = %s \n", name[3]); } [root@localhost 99]# ./test hos = Illegal day hos = Monday hos = Wednesday Segmentation fault ==》
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尚方寶劍之說
TA貢獻1788條經(jīng)驗 獲得超4個贊
你用char
*name[]={
"1...","2...","3...","4...","5...","6...","7...","8..."}的格式定義的name是個指針數(shù)組，其每一個元素都是一個char型指針，抽出第一個來看就是char
*name[0]="1..."，它的一般形式是char
*p="abc..."。這種形式定義的指針是所謂“常指針”，p指向的內容*p是不允許寫改變的！而你的strncpy(name[0],"Illegal",7)試圖把Illegal的前7位寫進name[0]指向的單元開始的空間去，是非法的，所以報錯！用strcpy(name[0],"Illegal")同樣是不行的。name[0]~name[7]都是常指針，都不能被strcpy()操作。
改進的辦法是：將char
*name[]改為char
name[][12]={"...","...",...}，讓name成為一個可以寫操作的二維數(shù)組名就可以了。其中[12]是最長字符串Illegal
day所需要的空間。
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