这段代码改错#include "xmmintrin.h" #include <iostream> using namespace std; void main() { __declspec(align(16)) float Input1[4] = {1.0,2.0,3.0,4.0}; __declspec(align(16)) float Input2[4] = {5.0,6.0,7.0,8.0}; __declspec(align(16)) float Result[4]; __m128 a = _mm_load_ps(Input1); __m128 b = _mm_load_ps(Input2); __m128 c = _mm_add_ps(a,b); _mm_store_ps(Result,c); cout<<a.m128_f32[0]<<" "<<a.m128_f32[1]<<" " <<a.m128_f32[2]<<" "<<a.m128_f32[3]<<endl; cout<<b.m128_f32[0]<<" "<<b.m128_f32[1]<<" " <<b.m128_f32[2]<<" "<<b.m128_f32[3]<<endl; cout<<c.m128_f32[0]<<" "<<c.m128_f32[1]<<" " <<c.m128_f32[2]<<" "<<c.m128_f32[3]<<endl; for(int i=0;i<4;i++) { cout<<Result[i]<<" "; } cout<<endl; getchar(); }

这段代码需要做以下改动：

1. `void main()` 应改为 `int main()`，并在函数末尾返回一个整型值，例如 `return 0;`。

2. 头文件 `xmmintrin.h` 应放在头文件 `iostream` 之前。

3. 应在代码开头加入 `#include <cstdlib>`，以便使用 `getchar()` 函数。

修改后的代码如下所示：

#include <xmmintrin.h>
#include <iostream>
#include <cstdlib>
using namespace std;

int main() {
    __declspec(align(16)) float Input1[4] = {1.0,2.0,3.0,4.0};
    __declspec(align(16)) float Input2[4] = {5.0,6.0,7.0,8.0};
    __declspec(align(16)) float Result[4];
    __m128 a = _mm_load_ps(Input1);
    __m128 b = _mm_load_ps(Input2);
    __m128 c = _mm_add_ps(a,b);
    _mm_store_ps(Result,c);
    cout<<a.m128_f32[0]<<" "<<a.m128_f32[1]<<" " <<a.m128_f32[2]<<" "<<a.m128_f32[3]<<endl;
    cout<<b.m128_f32[0]<<" "<<b.m128_f32[1]<<" " <<b.m128_f32[2]<<" "<<b.m128_f32[3]<<endl;
    cout<<c.m128_f32[0]<<" "<<c.m128_f32[1]<<" " <<c.m128_f32[2]<<" "<<c.m128_f32[3]<<endl;
    for(int i=0;i<4;i++) {
        cout<<Result[i]<<" ";
    }
    cout<<endl;
    getchar();
    return 0;
}