我是C语言的新手,想知道如何使用指针获取数组的每个元素。当且仅当您知道数组的大小时,这才容易。因此,让代码为:
#include
int main (int argc, string argv[]) {
char * text = "John Does Nothing";
char text2[] = "John Does Nothing";
int s_text = sizeof(text); // returns size of pointer. 8 in 64-bit machine
int s_text2 = sizeof(text2); //returns 18. the seeked size.
printf("first string: %s, size: %d\n second string: %s, size: %d\n", text, s_text, text2, s_text2);
return 0;
}
现在我要确定的大小text。为此,我发现字符串将以'\0'字符结尾。所以我写了以下函数:
int main (int argc, string argv[]) {
char * text = "John Does Nothing";
char text2[] = "John Does Nothing";
int s_text = sizeof(text); // returns size of pointer. 8 in 64-bit machine
int s_text2 = sizeof(text2); //returns 18. the seeked size.
printf("first string: %s, size: %d\n second string: %s, size: %d\n", text, s_text, text2, s_text2);
return 0;
}
但是,此功能不起作用,因为循环似乎没有终止。
那么,有没有办法获取char指针指向的s的实际大小?