首页#include <iostream> #include <cstring> using namespace std; #define SIZE 100 char buf[SIZE]; char* p = buf; char* alloc(int n) { char* begin; if (p + n <= buf + SIZE) { begin = p; p = p + n; return(begin); } else return(NULL); } int main() { char* p1, * p2; int i; p1 = alloc(10); strcpy(p1, "123456789"); p2 = alloc(5); strcpy(p2, "abcd"); cout << "buf=" << (void*)buf << endl; cout << "p1=" << (void*)p1 << endl; cout << "p2=" << (void*)p2 << endl; cout << p1 << endl; cout << p2 << endl; for (i = 0; i < 15; i++) cout << buf[i]; return 0; }修改它使得用vs能运行

#include <iostream> #include <cstring> using namespace std; #define SIZE 100 char buf[SIZE]; char* p = buf; char* alloc(int n) { char* begin; if (p + n <= buf + SIZE) { begin = p; p = p + n; return(begin); } else return(NULL); } int main() { char* p1, * p2; int i; p1 = alloc(10); strcpy(p1, "123456789"); p2 = alloc(5); strcpy(p2, "abcd"); cout << "buf=" << (void)buf << endl; cout << "p1=" << (void)p1 << endl; cout << "p2=" << (void*)p2 << endl; cout << p1 << endl; cout << p2 << endl; for (i = 0; i < 15; i++) cout << buf[i]; return 0; }修改它使得用vs能运行

时间: 2024-01-31 19:03:39 浏览: 73

这段代码在Visual Studio中需要进行以下修改才能运行： 1. 将头文件的包含语句从一行分成两行： ``` #include <iostream> #include <cstring> ``` 2. 去掉"using namespace std;"，改为使用std::前缀。 3. 将strcpy函数改为strcpy_s函数。strcpy_s函数是一个安全的函数，它会检查目标数组的大小，防止缓冲区溢出。 4. 将指向buf的指针p的初始化改为以下形式： ``` char* p = &buf[0]; ``` 最终修改后的代码如下： ``` #include <iostream> #include <cstring> #define SIZE 100 char buf[SIZE]; char* p = &buf[0]; char* alloc(int n) { char* begin; if (p + n <= buf + SIZE) { begin = p; p = p + n; return(begin); } else return(NULL); } int main() { char* p1, * p2; int i; p1 = alloc(10); strcpy_s(p1, 11, "123456789"); p2 = alloc(5); strcpy_s(p2, 6, "abcd"); std::cout << "buf=" << (void*)buf << std::endl; std::cout << "p1=" << (void*)p1 << std::endl; std::cout << "p2=" << (void*)p2 << std::endl; std::cout << p1 << std::endl; std::cout << p2 << std::endl; for (i = 0; i < 15; i++) std::cout << buf[i]; return 0; } ``` 经过以上修改，该代码能够在Visual Studio中成功编译和运行。

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