使用strncpy_s 比 使用strncpy更加安全
以下使用strncpy 但不安全#include <stdio.h>#include <malloc.h>#include <string.h>#include <windows.h>int main (int argc, char *argv[]){char *p = "hello who you are ? ";char *dest;char s;int valLen;dest = (char *) malloc (sizeof (char) * 1000);//if we use strncpy_s we will get assert//for the size is not enough//we can just change s to s/*strncpy_s(s, _countof(s), p, strlen(p));printf("%s\n", s);*/ // Here we use strncpy and get null terminationstrncpy (dest, p, (valLen = strlen(p)));dest = '\0';printf ("%s\n", dest);//system ("pause");return 0;}
以下用strncpy 我们认为它更安全
#include <stdio.h>#include <malloc.h>#include <string.h>#include <windows.h>int main (int argc, char *argv[]){char *p = "hello who you are ? ";char *dest;char s;int valLen;dest = (char *) malloc (sizeof (char) * 1000);//if we use strncpy_s we will get assert//for the size is not enough//we can just change s to s strncpy_s(s, _countof(s), p, strlen(p));printf("%s\n", s); // Here we use strncpy and get null termination /*strncpy (dest, p, (valLen = strlen(p)));dest = '\0';printf ("%s\n", dest); *///system ("pause");return 0;}
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