{"id":110520,"date":"2026-09-28T20:56:40","date_gmt":"2026-09-28T12:56:40","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/110520.html"},"modified":"2026-09-28T20:56:40","modified_gmt":"2026-09-28T12:56:40","slug":"c%e9%ab%98%e7%b2%be%e5%ba%a6%e7%ae%97%e6%b3%95%e5%ae%9e%e7%8e%b0%e6%80%9d%e8%b7%af%e4%b8%8e%e4%bb%a3%e7%a0%81","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/110520.html","title":{"rendered":"C++\u9ad8\u7cbe\u5ea6\u7b97\u6cd5\u5b9e\u73b0\u601d\u8def\u4e0e\u4ee3\u7801"},"content":{"rendered":"

\u524d\u8a00<\/h3>\n

\u7531\u4e8ec++\u4e0d\u80fd\u8fdb\u884c\u4f4d\u6570\u8fc7\u9ad8\u7684\u6570\u636e\u8fd0\u7b97，\u6240\u4ee5\u8981\u901a\u8fc7\u6a21\u62df\u6570\u7ec4\u6765\u8fdb\u884c\u8fd0\u7b97，\u9996\u5148\u662f\u52a0\u6cd5\u3002\u901a\u8fc7char\u6216string\u578b\u6570\u636e\u8f93\u5165\u5b57\u7b26\u6765\u6a21\u62df\u6570\u5b57\u7684\u8f93\u5165，\u6570\u7ec4\u4e0b\u8868\u5bf9\u5e94\u7684\u5143\u7d20\u5e94\u5f53\u662f\u5904\u4e8e\u540c\u4e00\u4f4d\u7f6e\u7684\u6570\u5b57，\u4e0b\u6807\u76f8\u540c\u7684\u4e24\u4e2a\u5143\u7d20\u76f8\u52a0\u8868\u793a\u7684\u65e2\u662f\u7ed3\u679c\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u9ad8\u7cbe\u5ea6\u52a0\u6cd5<\/h3>\n<\/p>\n

1\u3001\u601d\u8def<\/h4>\n

\u5176\u5b9e\u9ad8\u7cbe\u5ea6\u52a0\u6cd5\u548c\u666e\u901a\u7684\u52a0\u6cd5\u601d\u8def\u6ca1\u6709\u4ec0\u4e48\u533a\u522b\u3002\u5c31\u662f\u4e2a\u4f4d\u6570\u5148\u76f8\u52a0，\u7136\u540e\u5224\u65ad\u8fdb\u4f4d，\u5728\u628a\u8fdb\u4f4d\u8fdb\u884c\u76f8\u52a0\u3002\u6700\u540e\u5f97\u5230\u7ed3\u679c\u3002<\/p>\n<\/p>\n

\"\"<\/p>\n

\u4ece\u4e2a\u4f4d\u5f00\u59cb\u8fdb\u884c\u76f8\u52a0，\u8fdb\u4f4d\u64cd\u4f5c\u3002（\u901a\u8fc7\u6570\u7ec4\u8fdb\u884c\u5b58\u50a8）\u00a0<\/p>\n<\/p>\n

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\n

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\n

#include<iostream><\/p>\n

#include<string><\/p>\n

using namespace std;<\/p>\n<\/p>\n

const int N = 510;\/\/\u6570\u5b57\u6700\u5927\u53ef\u4ee5\u5b58\u50a8509\u4f4d\u7684\u6570\u5b57<\/p>\n

int a[N];\/\/\u8981\u76f8\u52a0\u7684\u6570\u5b57<\/p>\n

int b[N];\/\/\u8981\u76f8\u52a0\u7684\u6570\u5b57<\/p>\n

int c[N];\/\/\u5f97\u5230\u7684\u7ed3\u679c<\/p>\n

int main()<\/p>\n

{<\/p>\n

\u00a0\u00a0\u00a0\u00a0string str1;\/\/\u8981\u60f3\u52a0\u7684\u6570\u5b57<\/p>\n

\u00a0\u00a0\u00a0\u00a0string str2;\/\/\u8981\u76f8\u52a0\u7684\u6570\u5b57<\/p>\n

\u00a0\u00a0\u00a0\u00a0cin >> str1;<\/p>\n

\u00a0\u00a0\u00a0\u00a0cin >> str2;<\/p>\n

\u00a0\u00a0\u00a0\u00a0\/\/\u5c06str1\u548cstr2\u8fdb\u884c\u9006\u7f6e\u5b58\u653e<\/p>\n

\u00a0\u00a0\u00a0\u00a0for (int i = 0; i < str1.size(); i++)<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0a[str1.size() – 1 – i] = str1[i] – '0';<\/p>\n

\u00a0\u00a0\u00a0\u00a0for (int i = 0; i < str2.size(); i++)<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0b[str2.size() – 1 – i] = str2[i] – '0';<\/p>\n

\u00a0\u00a0\u00a0\u00a0\/\/\u5f97\u5230\u6700\u5927\u7684\u4f4d\u6570<\/p>\n

\u00a0\u00a0\u00a0\u00a0int ans = max(str1.size(), str2.size());<\/p>\n

\u00a0\u00a0\u00a0\u00a0for (int i = 0; i < ans; i++) {<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0c[i] += a[i] + b[i];\/\/\u76f8\u52a0<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0c[i + 1] = c[i] \/ 10;\/\/\u8fdb\u4f4d<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0c[i] %= 10;\/\/\u5982\u679c1\u4f4d\u6570\u5927\u4e8e10，\u5bf9\u5176\u8fdb\u884c\u53d6\u4f59<\/p>\n

\u00a0\u00a0\u00a0\u00a0}<\/p>\n

\u00a0\u00a0\u00a0\u00a0ans += 1;\/\/\u907f\u514d\u6700\u5927\u4f4d\u6570\u76f8\u52a0\u5b8c\u4e4b\u540e\u6709\u8fdb\u4f4d：\u6bd4\u5982\u8bf4500+500，5+5=10，\u8981\u8fdb\u4f4d<\/p>\n

\u00a0\u00a0\u00a0\u00a0\/\/\u53bb\u9664\u524d\u5bfc0<\/p>\n

\u00a0\u00a0\u00a0\u00a0if (c[ans – 1] == 0 && ans > 1)<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0ans -= 1;<\/p>\n

\u00a0\u00a0\u00a0\u00a0\/\/\u8f93\u51fa<\/p>\n

\u00a0\u00a0\u00a0\u00a0for (int i = 0; i < ans; i++)<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0cout << c[ans – 1 – i];<\/p>\n

\u00a0\u00a0\u00a0\u00a0return 0;<\/p>\n

}<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u4e8c\u3001\u9ad8\u7cbe\u5ea6\u4e58\u6cd5\u00a0<\/h3>\n

1\u3001\u601d\u8def<\/h4>\n
    \n
  • \u6309\u7167\u5e38\u89c4\u7684\u9ad8\u7cbe\u5ea6\u4e58\u6cd5\u7684\u601d\u8def，\u5206\u522b\u5148\u7528\u4e24\u4e2a\u6570\u7ec4\u9006\u5e8f\u5b58\u50a8\u4e24\u6570，\u65b9\u4fbf\u8ba1\u7b97\u3002<\/li>\n
  • \u7ed3\u679c\u7684\u957f\u5ea6\u5fc5\u7136\u4e0d\u4f1a\u8d85\u8fc7\u4e24\u6570\u7684\u957f\u5ea6\u4e4b\u548c\u3002<\/li>\n
  • \u8fdb\u884c\u4e58\u6cd5\u8fd0\u7b97\u65f6，\u6211\u4eec\u53ef\u4ee5\u5148\u4e0d\u7528\u8003\u8651\u8fdb\u4f4d，\u6309\u7167\u5e38\u89c4\u601d\u8def\u76f4\u63a5\u7b97\u3002<\/li>\n
  • \u8ba1\u7b97\u5b8c\u6210\u540e，\u5904\u7406\u6570\u7ec4\u4e2d\u7ed3\u679c\u5927\u4e8e\u6216\u7b49\u4e8e10\u7684\u4f4d\u7f6e，\u5373\u5411\u524d\u8fdb\u4f4d\u3002<\/li>\n
  • \u6700\u540e，\u5904\u7406\u524d\u5bfc\u96f6，\u5c06\u7ed3\u679c\u9006\u5e8f\u8f93\u51fa\u3002<\/li>\n<\/ul>\n

    \u9ad8\u7cbe\u5ea6\u4e58\u6cd5\u548c\u7ad6\u5f0f\u8fd0\u7b97\u7684\u4e58\u6cd5\u601d\u8def\u662f\u4e00\u6837\u7684\u3002\u5982\u56fe\u6240\u793a：<\/p>\n<\/p>\n

    \"\"<\/p>\n<\/p>\n

    \"\"<\/p>\n

    \u6839\u636e\u4e0a\u9762\u7684\u89c4\u5f8b\u53ef\u4ee5\u77e5\u9053\u4e0b\u56fe\u7684\u516c\u5f0f\u3002\u00a0<\/p>\n<\/p>\n

    \"\"<\/p>\n<\/p>\n

    2\u3001\u4ee3\u7801\u00a0<\/h4>\n\n\n\n
    \n

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    50<\/p>\n<\/td>\n

    		\n

    #include<iostream><\/p>\n

    using namespace std;<\/p>\n

    const int N = 2000;<\/p>\n

    int m[N];\/\/\u8981\u7b97\u7684\u6570<\/p>\n

    int n[N];\/\/\u8981\u7b97\u7684\u6570<\/p>\n

    int ans[2 * N];\/\/\u6240\u5f97\u7684\u7b54\u6848<\/p>\n

    int main() {<\/p>\n

    \u00a0\u00a0\u00a0\u00a0string a, b;\/\/\u5b57\u7b26\u4e32\u8f93\u5165<\/p>\n

    \u00a0\u00a0\u00a0\u00a0cin >> a >> b;<\/p>\n

    \u00a0\u00a0\u00a0\u00a0int la = a.size();\/\/a\u7684\u5b57\u7b26\u4e32\u957f，\u4e5f\u5c31\u662f\u4e58\u6570\u7684\u4f4d\u6570<\/p>\n

    \u00a0\u00a0\u00a0\u00a0int lb = b.size();\/\/b\u7684\u5b57\u7b26\u4e32\u957f，\u4e5f\u5c31\u662f\u4e58\u6570\u7684\u4f4d\u6570<\/p>\n

    \u00a0\u00a0\u00a0\u00a0int i = 0, j = 0;<\/p>\n

    \u00a0\u00a0\u00a0\u00a0\/\/\u9006\u5e8f\u5b58\u5165\u6570\u7ec4\u4e2d<\/p>\n

    \u00a0\u00a0\u00a0\u00a0for (i = 0; i < la; i++) {<\/p>\n

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0m[i] = a[la – i – 1] – '0';<\/p>\n

    \u00a0\u00a0\u00a0\u00a0}<\/p>\n

    \u00a0\u00a0\u00a0\u00a0\/\/\u9006\u5e8f\u5b58\u5165\u6570\u7ec4\u4e2d<\/p>\n

    \u00a0\u00a0\u00a0\u00a0for (j = 0; j < lb; j++) {<\/p>\n

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0n[j] = b[lb – j – 1] – '0';<\/p>\n

    \u00a0\u00a0\u00a0\u00a0}<\/p>\n

    \u00a0\u00a0\u00a0\u00a0\/\/\u6839\u636e\u516c\u5f0f\u8fdb\u884c\u8ba1\u7b97<\/p>\n

    \u00a0\u00a0\u00a0\u00a0for (i = 0; i < la; i++) {<\/p>\n

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0for (j = 0; j < lb; j++) {<\/p>\n

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0ans[i + j] += m[i] * n[j];<\/p>\n

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}<\/p>\n

    \u00a0\u00a0\u00a0\u00a0}<\/p>\n

    \u00a0\u00a0\u00a0\u00a0\/\/\u4e0a\u8ff0\u4ec5\u8fdb\u884c\u4e86\u8ba1\u7b97\u5404\u4e2a\u4f4d\u7684\u6570，\u6ca1\u6709\u8003\u8651\u8fdb\u4f4d<\/p>\n

    \u00a0\u00a0\u00a0\u00a0\/\/\u4e0b\u9762\u5faa\u73af\u8003\u8651\u8fdb\u4f4d<\/p>\n

    \u00a0\u00a0\u00a0\u00a0\/\/ns\u4e3a\u7b54\u6848\u7684\u4f4d\u6570，\u7531\u4f8b\u5b50\u53ef\u77e5，\u7b54\u6848\u7684\u4f4d\u6570\u7684\u6700\u5c0f\u503c\u4e3ala+lb-1<\/p>\n

    \u00a0\u00a0\u00a0\u00a0int ns = la + lb – 1;<\/p>\n

    \u00a0\u00a0\u00a0\u00a0for (i = 0; i < ns; i++) {<\/p>\n

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/\u5404\u4f4d\u5927\u4e8e9\u65f6，\u624d\u8003\u8651\u8fdb\u4f4d\u7684\u95ee\u9898<\/p>\n

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0if (ans[i] > 9) {<\/p>\n

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0ans[i + 1] += ans[i] \/ 10;<\/p>\n

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0ans[i] %= 10;<\/p>\n

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}<\/p>\n

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/\u5982\u679ci+1\u8fdb\u4f4d\u5927\u4e8ens，ns\u8981\u8fdb\u884c\u66f4\u65b0<\/p>\n

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0if (i + 1 > ns) {<\/p>\n

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0ns++;<\/p>\n

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}<\/p>\n

    \u00a0\u00a0\u00a0\u00a0}<\/p>\n

    \u00a0\u00a0\u00a0\u00a0\/\/\u9006\u5e8f\u6253\u5370<\/p>\n

    \u00a0\u00a0\u00a0\u00a0\/\/\u8003\u8651\u5148\u5bfc0\u7684\u95ee\u9898<\/p>\n

    \u00a0\u00a0\u00a0\u00a0if (ans[i] == 0 && ns > 1)<\/p>\n

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0ns–;<\/p>\n

    \u00a0\u00a0\u00a0\u00a0for (i = ns; i >= 0; i–) {<\/p>\n

    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0cout << ans[i];<\/p>\n

    \u00a0\u00a0\u00a0\u00a0}<\/p>\n

    \u00a0\u00a0\u00a0\u00a0return 0;<\/p>\n

    }<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    \"\"<\/p>\n<\/p>\n

    \u9644：c++\u9ad8\u7cbe\u5ea6\u6d6e\u70b9\u6570\u8ba1\u7b97<\/h3>\n

    C++\u81ea\u5e26\u7684float\u548cdouble\u7c7b\u578b\u7cbe\u5ea6\u6709\u9650，\u65e0\u6cd5\u8fdb\u884c\u9ad8\u7cbe\u5ea6\u8ba1\u7b97\u3002\u5982\u679c\u9700\u8981\u8fdb\u884c\u9ad8\u7cbe\u5ea6\u6d6e\u70b9\u6570\u8ba1\u7b97，\u53ef\u4ee5\u4f7f\u7528\u7b2c\u4e09\u65b9\u5e93，\u5982GMP（GNU Multiple Precision Arithmetic Library）\u548cMPFR（Multiple Precision Floating-Point Reliable Library）\u7b49\u3002<\/p>\n

    \u4ee5\u4e0b\u662f\u4f7f\u7528GMP\u5e93\u8fdb\u884c\u9ad8\u7cbe\u5ea6\u6d6e\u70b9\u6570\u8ba1\u7b97\u7684\u793a\u4f8b\u4ee3\u7801：<\/p>\n\n\n\n
    \n

    1<\/p>\n

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    13<\/p>\n<\/td>\n

    		\n

    #include <iostream><\/p>\n

    #include <gmpxx.h><\/p>\n<\/p>\n

    int main()<\/p>\n

    {<\/p>\n

    \u00a0\u00a0\u00a0\u00a0mpf_set_default_prec(64); \/\/ \u8bbe\u7f6e\u9ed8\u8ba4\u7cbe\u5ea6\u4e3a64\u4f4d<\/p>\n

    \u00a0\u00a0\u00a0\u00a0mpf_class a("123.456"); \/\/ \u5b9a\u4e49\u9ad8\u7cbe\u5ea6\u6d6e\u70b9\u6570a<\/p>\n

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