strcpy源码实现方式
#include<bits/stdc++.h> using namespace std; char *strcpy(char *a,const char *b) { if(a == NULL || b == NULL) exit(0); char *c = a; while((*a++ = *b++) != '\0'); return c; } int main() { char a[2] = "a"; char b[] = "bdfasdfdsfab"; strcpy(a,b); cout << a << endl; return 0; }