鍦–璇█涓紝鍙互閫氳繃浣跨敤鎸囬拡鏉ュ疄鐜伴棿鎺ュ紩鐢ㄣ€傚叿浣撳疄鐜版柟娉曞涓嬶細

1. 瀹氫箟涓€涓寚鍚戝彉閲忕殑鎸囬拡銆?/li>
2. 灏嗘寚閽堟寚鍚戝彉閲忕殑鍦板潃銆?/li>
3. 浣跨敤闂存帴寮曠敤杩愮畻绗?code>*鏉ヨ闂寚閽堟墍鎸囧悜鐨勫彉閲忕殑鍊笺€?/li>

涓嬮潰鏄竴涓叿浣撶殑渚嬪瓙鏉ヨ鏄庨棿鎺ュ紩鐢ㄧ殑瀹炵幇锛?/p>

#include <stdio.h>

int main() {
    int num = 10;  // 瀹氫箟涓€涓暣鏁板彉閲弉um
    int *ptr;     // 瀹氫箟涓€涓寚鍚戞暣鏁扮殑鎸囬拡ptr

    ptr = &num;   // 灏唒tr鎸囧悜num鐨勫湴鍧€

    printf("num鐨勫€间负锛?d\n", num);
    printf("閫氳繃鎸囬拡闂存帴寮曠敤璁块棶num鐨勫€硷細%d\n", *ptr);

    *ptr = 20;    // 閫氳繃鎸囬拡闂存帴淇敼num鐨勫€?/span>

    printf("淇敼鍚庣殑num鐨勫€间负锛?d\n", num);

    return 0;
}

杈撳嚭缁撴灉锛?/p>

num鐨勫€间负锛?0
閫氳繃鎸囬拡闂存帴寮曠敤璁块棶num鐨勫€硷細10
淇敼鍚庣殑num鐨勫€间负锛?0

鍦ㄤ笂闈㈢殑浠ｇ爜涓紝棣栧厛瀹氫箟浜嗕竴涓暣鏁板彉閲?code>num鍜屼竴涓寚鍚戞暣鏁扮殑鎸囬拡ptr銆傜劧鍚庡皢鎸囬拡ptr鎸囧悜num鐨勫湴鍧€锛屽嵆ptr = &num銆傞€氳繃鎸囬拡闂存帴寮曠敤杩愮畻绗?code>*鏉ヨ闂寚閽堟墍鎸囧悜鐨勫彉閲忕殑鍊笺€傚湪鏈€鍚庯紝閫氳繃鎸囬拡闂存帴淇敼浜?code>num鐨勫€笺€?/p>