1 #include "stdafx.h"
2 #include "iostream"
3 #include "assert.h"
4 5 using namespace std;
6 7 char* mystrncpy(
char* dest,
const char* src,
int n)
8 {
9 assert(dest!=NULL && src!=NULL);
10 int count = 0;
11 while (*src != '\0')
12 {
13 if (count >= n)
14 {
15 break;
16 }
17 dest[count++] = *src++;
18 }
19 dest[count] = '\0';
20 return dest;
21 }
22 23 int main(
int argc,
char* argv[])
24 {
25 printf("Hello World!\n");
26 char buf[10] = {0};
27 mystrncpy(buf, "FUCK!", 4);
28 cout << buf << endl;
29 return 0;
30 }
输出:
Hello World!
FUCK!
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