#include <stdio.h>
#include <math.h>
#include <time.h>

void applyGaussianBlur(float src[5][5], float dst[5][5], int h, int w, float kernel[3][3]) {
    for (int i = 1; i < h - 1; i++) {
        for (int j = 1; j < w - 1; j++) {
            dst[i][j] = 0;
            for (int ki = -1; ki <= 1; ki++) {
                for (int kj = -1; kj <= 1; kj++) {
                    dst[i][j] += src[i + ki][j + kj] * kernel[1 + ki][1 + kj];
                }
            }
        }
    }
}

int main() {
    float src[5][5] = {
        {0, 0, 0, 0, 0},
        {0, 1, 2, 3, 0},
        {0, 4, 5, 6, 0},
        {0, 7, 8, 9, 0},
        {0, 0, 0, 0, 0}
    };
    float dst[5][5] = {0};
    float kernel[3][3] = {
        {1.0/16, 2.0/16, 1.0/16},
        {2.0/16, 4.0/16, 2.0/16},
        {1.0/16, 2.0/16, 1.0/16}
    };

    clock_t start = clock();
    applyGaussianBlur(src, dst, 5, 5, kernel);
    clock_t end = clock();

    printf("输出结果：\n");
    for (int i = 0; i < 5; i++) {
        for (int j = 0; j < 5; j++) {
            printf("%.2f ", dst[i][j]);
        }
        printf("\n");
    }
    printf("运行时间：%.2fs\n", (double)(end - start) / CLOCKS_PER_SEC);

    return 0;
}