{"id":309957,"date":"2024-05-20T21:38:45","date_gmt":"2024-05-20T13:38:45","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/309957.html"},"modified":"2024-05-20T21:39:04","modified_gmt":"2024-05-20T13:39:04","slug":"c%e8%af%ad%e8%a8%80%e9%87%8c%e6%80%8e%e4%b9%88%e5%86%99x%e7%9a%84n%e6%ac%a1%e6%96%b9%e7%9a%84%e4%bb%a3%e7%a0%81-4","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/309957.html","title":{"rendered":"C\u8bed\u8a00\u91cc\u600e\u4e48\u5199x\u7684n\u6b21\u65b9\u7684\u4ee3\u7801"},"content":{"rendered":"

\"C\u8bed\u8a00\u91cc\u600e\u4e48\u5199x\u7684n\u6b21\u65b9\u7684\u4ee3\u7801\"<\/p>\n

\u5728C\u8bed\u8a00\u4e2d\uff0c\u5b9e\u73b0\u4e00\u4e2a\u53d8\u91cfx<\/code>\u7684n<\/code>\u6b21\u65b9\uff0c\u53ef\u4ee5\u901a\u8fc7\u51e0\u79cd\u4e0d\u540c\u7684\u65b9\u6cd5\u6765\u5b8c\u6210\u3002\u6700\u76f4\u63a5\u7684\u65b9\u6cd5\u5305\u62ec\u5229\u7528\u5faa\u73af\u7ed3\u6784\u3001\u8c03\u7528pow<\/code>\u51fd\u6570\u3001\u4ee5\u53ca\u4f7f\u7528\u9012\u5f52\u3002<\/strong> \u5bf9\u8fd9\u4e9b\u65b9\u6cd5\u4e2d\u7684\u4e00\u4e2a\u8fdb\u884c\u8be6\u7ec6\u63cf\u8ff0\uff1a\u8c03\u7528pow<\/code>\u51fd\u6570\u662f\u4e00\u79cd\u7b80\u5355\u9ad8\u6548\u7684\u65b9\u6cd5\u3002pow<\/code>\u51fd\u6570\u662f\u6570\u5b66\u5e93\uff08math.h<\/code>\uff09\u4e2d\u7684\u4e00\u4e2a\u51fd\u6570\uff0c\u5b83\u53ef\u4ee5\u63a5\u53d7\u4e24\u4e2a\u53c2\u6570\uff1a\u5e95\u6570\uff08x<\/code>\uff09\u548c\u6307\u6570\uff08n<\/code>\uff09\uff0c\u7136\u540e\u8fd4\u56dex<\/code>\u7684n<\/code>\u6b21\u65b9\u7684\u7ed3\u679c\u3002\u4f7f\u7528pow<\/code>\u51fd\u6570\u4e4b\u524d\u9700\u8981\u5305\u542b\u6570\u5b66\u5e93\u5934\u6587\u4ef6#include <math.h><\/code>\uff0c\u5e76\u4e14\u5728\u7f16\u8bd1\u65f6\u94fe\u63a5\u6570\u5b66\u5e93\uff0c\u4f8b\u5982\u5728GCC\u4e2d\u4f7f\u7528-lm<\/code>\u9009\u9879\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u4f7f\u7528\u5faa\u73af\u7ed3\u6784<\/h3>\n<\/p>\n

\u5bf9\u4e8e\u8ba1\u7b97x<\/code>\u7684n<\/code>\u6b21\u65b9\uff0c\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u4e00\u4e2a\u5faa\u73af\u6765\u7d2f\u4e58x<\/code>\u81ea\u8eabn<\/code>\u6b21\u3002\u8fd9\u79cd\u65b9\u6cd5\u7b80\u5355\u76f4\u89c2\uff0c\u5e76\u4e14\u4e0d\u9700\u8981\u8c03\u7528\u4efb\u4f55\u989d\u5916\u7684\u5e93\u51fd\u6570\u3002<\/p>\n<\/p>\n

#include<stdio.h><\/p>\n
double power(int x, unsigned int n) {<\/p>\n
    double result = 1.0;<\/p>\n
    for(unsigned int i = 0; i < n; i++) {<\/p>\n
        result *= x;<\/p>\n
    }<\/p>\n
    return result;<\/p>\n
}<\/p>\n
int mAI<\/a>n() {<\/p>\n
    int x = 2;<\/p>\n
    unsigned int n = 5;<\/p>\n
    printf("%d \u7684 %d \u6b21\u65b9\u662f %f\\n", x, n, power(x,n));<\/p>\n
    return 0;<\/p>\n
}<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u9996\u5148\u5b9a\u4e49\u4e00\u4e2apower<\/code>\u51fd\u6570\uff0c\u5b83\u63a5\u53d7\u4e24\u4e2a\u53c2\u6570\u2014\u2014\u57fa\u6570x<\/code>\u548c\u6307\u6570n<\/code>\u3002\u5728\u51fd\u6570\u5185\u90e8\uff0c\u521d\u59cb\u5316\u4e00\u4e2a\u540d\u4e3aresult<\/code>\u7684\u53d8\u91cf\uff0c\u7528\u4e8e\u7d2f\u79ef\u7ed3\u679c\u503c\u3002\u7136\u540e\uff0c\u901a\u8fc7\u4e00\u4e2afor<\/code>\u5faa\u73af\u6765\u5b9e\u73b0n<\/code>\u6b21\u7684\u7d2f\u4e58\u3002\u6700\u540e\uff0c\u8fd4\u56de\u6700\u7ec8\u7d2f\u4e58\u7684\u7ed3\u679c\u3002<\/p>\n<\/p>\n
\u4e8c\u3001\u8c03\u7528pow<\/code>\u51fd\u6570<\/h3>\n<\/p>\n
\u4f7f\u7528\u6807\u51c6\u6570\u5b66\u5e93\u4e2d\u7684pow<\/code>\u51fd\u6570\u53ef\u4ee5\u66f4\u76f4\u63a5\u5730\u6c42\u89e3x<\/code>\u7684n<\/code>\u6b21\u65b9\uff0c\u8fd9\u8981\u6c42\u5305\u542bmath.h<\/code>\u5934\u6587\u4ef6\uff0c\u5e76\u5728\u94fe\u63a5\u65f6\u94fe\u63a5\u6570\u5b66\u5e93\u3002<\/p>\n<\/p>\n
#include<stdio.h><\/p>\n
#include<math.h><\/p>\n
int main() {<\/p>\n
    double x = 2.0;<\/p>\n
    double n = 5.0;<\/p>\n
    double result = pow(x,n);<\/p>\n
    printf("%.1f \u7684 %.1f \u6b21\u65b9\u662f %.1f\\n", x, n, result);<\/p>\n
    return 0;<\/p>\n
}<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u901a\u8fc7pow<\/code>\u51fd\u6570\uff0c\u53ea\u9700\u7b80\u5355\u5730\u4f20\u5165\u4e24\u4e2a\u53c2\u6570\uff1a\u5e95\u6570x<\/code>\u548c\u6307\u6570n<\/code>\uff0c\u5373\u53ef\u83b7\u5f97x<\/code>\u7684n<\/code>\u6b21\u65b9\u7684\u7ed3\u679c\uff0c\u8fd9\u6837\u5199\u4ee3\u7801\u66f4\u52a0\u7b80\u6d01\u3002<\/p>\n<\/p>\n
\u4e09\u3001\u4f7f\u7528\u9012\u5f52<\/h3>\n<\/p>\n
\u9012\u5f52\u662f\u53e6\u4e00\u79cd\u8ba1\u7b97x<\/code>\u7684n<\/code>\u6b21\u65b9\u7684\u6709\u8da3\u65b9\u5f0f\u3002\u8fd9\u79cd\u65b9\u6cd5\u901a\u8fc7\u51fd\u6570\u8c03\u7528\u81ea\u8eab\u6765\u5b9e\u73b0\u9012\u5f52\u8ba1\u7b97\uff0c\u5e76\u9010\u6b65\u903c\u8fd1\u6700\u7ec8\u7ed3\u679c\u3002<\/p>\n<\/p>\n
#include<stdio.h><\/p>\n
double power(int x, unsigned int n) {<\/p>\n
    if(n == 0) return 1;<\/p>\n
    else if(n % 2 == 0) return power(x, n\/2) * power(x, n\/2);<\/p>\n
    else return x * power(x, n\/2) * power(x, n\/2);<\/p>\n
}<\/p>\n
int main() {<\/p>\n
    int x = 2;<\/p>\n
    unsigned int n = 5;<\/p>\n
    printf("%d \u7684 %d \u6b21\u65b9\u662f %f\\n", x, n, power(x,n));<\/p>\n
    return 0;<\/p>\n
}<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u4e2a\u65b9\u6cd5\u91cc\uff0cpower<\/code>\u51fd\u6570\u9996\u5148\u68c0\u67e5\u6307\u6570n<\/code>\u662f\u5426\u4e3a\u96f6\uff0c\u662f\u7684\u8bdd\u76f4\u63a5\u8fd4\u56de1<\/code>\uff08\u4efb\u4f55\u6570\u76840\u6b21\u65b9\u90fd\u662f1\uff09\u3002\u5982\u679cn<\/code>\u662f\u5076\u6570\uff0c\u5219\u901a\u8fc7\u9012\u5f52\u8c03\u7528\u8ba1\u7b97x<\/code>\u7684n\/2<\/code>\u6b21\u65b9\uff0c\u7136\u540e\u5c06\u7ed3\u679c\u4e0e\u81ea\u8eab\u76f8\u4e58\u3002\u5982\u679cn<\/code>\u662f\u5947\u6570\uff0c\u5219\u8fd8\u9700\u8981\u989d\u5916\u4e58\u4ee5x<\/code>\u672c\u8eab\uff0c\u4ee5\u8865\u507f\u591a\u51fa\u6765\u7684\u4e00\u6b21\u3002\u9012\u5f52\u65b9\u6cd5\u867d\u7136\u4ee3\u7801\u7b80\u6d01\uff0c\u4f46\u5728\u5b9e\u9645\u5e94\u7528\u65f6\u53ef\u80fd\u4f1a\u7531\u4e8e\u6df1\u5ea6\u9012\u5f52\u5bfc\u81f4\u7684\u6808\u6ea2\u51fa\u800c\u53d7\u5230\u9650\u5236\u3002<\/p>\n<\/p>\n
\u901a\u8fc7\u8fd9\u51e0\u79cd\u65b9\u6cd5\uff0c\u6211\u4eec\u53ef\u4ee5\u770b\u51fa\uff0c\u5bf9\u4e8e\u5b9e\u73b0x<\/code>\u7684n<\/code>\u6b21\u65b9\u7684\u8ba1\u7b97\uff0c\u4e0d\u540c\u7684\u65b9\u6cd5\u6709\u5404\u81ea\u7684\u9002\u7528\u573a\u666f\u548c\u6027\u80fd\u8003\u91cf\u3002\u4f7f\u7528\u5faa\u73af\u7ed3\u6784\u548c\u8c03\u7528pow<\/code>\u51fd\u6570\u7684\u65b9\u6cd5\u6bd4\u8f83\u9002\u5408\u5927\u591a\u6570\u60c5\u51b5\uff0c\u800c\u9012\u5f52\u65b9\u6cd5\u5219\u9002\u5408\u6df1\u5ea6\u63a2\u8ba8\u7b97\u6cd5\u548c\u8ba1\u7b97\u673a\u79d1\u5b66\u3002<\/p>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
1. \u5982\u4f55\u5728C\u8bed\u8a00\u4e2d\u5b9e\u73b0\u8ba1\u7b97x\u7684n\u6b21\u65b9\u7684\u529f\u80fd\uff1f<\/strong>
\n\u5728C\u8bed\u8a00\u4e2d\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528\u5faa\u73af\u7ed3\u6784\u6765\u5b9e\u73b0\u8ba1\u7b97x\u7684n\u6b21\u65b9\u7684\u529f\u80fd\u3002\u9996\u5148\uff0c\u5b9a\u4e49\u4e00\u4e2a\u53d8\u91cfresult\u6765\u5b58\u50a8\u8ba1\u7b97\u7ed3\u679c\uff0c\u5e76\u5c06\u5176\u521d\u59cb\u5316\u4e3a1\u3002\u7136\u540e\uff0c\u4f7f\u7528\u4e00\u4e2a\u5faa\u73af\u6765\u91cd\u590d\u6267\u884cn\u6b21\u4ee5\u4e0b\u64cd\u4f5c\uff1a\u5c06result\u4e58\u4ee5x\u3002\u6700\u540e\uff0c\u5faa\u73af\u7ed3\u675f\u540e\uff0cresult\u5373\u4e3ax\u7684n\u6b21\u65b9\u7684\u503c\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n
#include <stdio.h>\n\nfloat power(float x, int n) {\n  float result = 1.0;\n  int i;\n\n  for (i = 0; i < n; i++) {\n    result *= x;\n  }\n\n  return result;\n}\n\nint main() {\n  float x = 2.0;\n  int n = 3;\n  \n  float result = power(x, n);\n  \n  printf("%.2f\u7684%d\u6b21\u65b9\u662f\uff1a%.2f\\n", x, n, result);\n  \n  return 0;\n}\n<\/code><\/pre>\n
2. C\u8bed\u8a00\u4e2d\u5982\u4f55\u5904\u7406x\u7684\u8d1f\u6570\u6b21\u65b9\u7684\u60c5\u51b5\uff1f<\/strong>
\n\u5728\u5904\u7406x\u7684\u8d1f\u6570\u6b21\u65b9\u65f6\uff0c\u53ef\u4ee5\u901a\u8fc7\u5c06x\u7684\u5012\u6570\u7684\u6b63\u6570\u6b21\u65b9\u6765\u5f97\u5230\u7ed3\u679c\u3002\u9996\u5148\uff0c\u5224\u65adn\u662f\u5426\u4e3a\u8d1f\u6570\uff0c\u5982\u679c\u662f\uff0c\u5219\u5c06x\u8d4b\u503c\u4e3a1.0\u9664\u4ee5x\uff0cn\u53d6\u7edd\u5bf9\u503c\u3002\u7136\u540e\uff0c\u6309\u6b63\u5e38\u7684\u65b9\u5f0f\u8ba1\u7b97x\u7684n\u6b21\u65b9\u3002\u6700\u540e\uff0c\u518d\u6b21\u5224\u65adn\u662f\u5426\u4e3a\u8d1f\u6570\uff0c\u5982\u679c\u662f\uff0c\u5219\u5c06\u7ed3\u679c\u53d6\u5012\u6570\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n
#include <stdio.h>\n\nfloat power(float x, int n) {\n  float result = 1.0;\n  int i;\n\n  if (n < 0) {\n    x = 1.0 \/ x;\n    n = -n;\n  }\n\n  for (i = 0; i < n; i++) {\n    result *= x;\n  }\n  \n  if (n < 0) {\n    result = 1.0 \/ result;\n  }\n\n  return result;\n}\n\nint main() {\n  float x = 2.0;\n  int n = -3;\n  \n  float result = power(x, n);\n  \n  printf("%.2f\u7684%d\u6b21\u65b9\u662f\uff1a%.2f\\n", x, n, result);\n  \n  return 0;\n}\n<\/code><\/pre>\n
3. \u5728C\u8bed\u8a00\u4e2d\u5982\u4f55\u5904\u7406x\u4e3a0\u6216n\u4e3a0\u7684\u60c5\u51b5\uff1f<\/strong>
\n\u5728C\u8bed\u8a00\u4e2d\uff0c\u5f53x\u4e3a0\u6216n\u4e3a0\u65f6\uff0c\u8ba1\u7b97x\u7684n\u6b21\u65b9\u7684\u7ed3\u679c\u90fd\u4e3a1\u3002\u56e0\u4e3a\u4efb\u4f55\u6570\u76840\u6b21\u65b9\u90fd\u7b49\u4e8e1\uff0c\u800c0\u7684\u4efb\u4f55\u6b21\u65b9\u90fd\u7b49\u4e8e0\u3002\u56e0\u6b64\uff0c\u65e0\u9700\u7279\u6b8a\u5904\u7406\u8fd9\u79cd\u60c5\u51b5\u3002\u5728\u5b9e\u9645\u7f16\u5199\u4ee3\u7801\u65f6\uff0c\u53ef\u4ee5\u76f4\u63a5\u8fd4\u56de1\u4f5c\u4e3a\u7ed3\u679c\u5373\u53ef\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n
#include <stdio.h>\n\nfloat power(float x, int n) {\n  if (x == 0.0 || n == 0) {\n    return 1.0;\n  }\n  \n  float result = 1.0;\n  int i;\n\n  for (i = 0; i < n; i++) {\n    result *= x;\n  }\n\n  return result;\n}\n\nint main() {\n  float x = 0.0;\n  int n = 3;\n  \n  float result = power(x, n);\n  \n  printf("%.2f\u7684%d\u6b21\u65b9\u662f\uff1a%.2f\\n", x, n, result);\n  \n  return 0;\n}\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"\u5728C\u8bed\u8a00\u4e2d\uff0c\u5b9e\u73b0\u4e00\u4e2a\u53d8\u91cfx\u7684n\u6b21\u65b9\uff0c\u53ef\u4ee5\u901a\u8fc7\u51e0\u79cd\u4e0d\u540c\u7684\u65b9\u6cd5\u6765\u5b8c\u6210\u3002\u6700\u76f4\u63a5\u7684\u65b9\u6cd5\u5305\u62ec\u5229\u7528\u5faa\u73af\u7ed3\u6784\u3001\u8c03\u7528pow\u51fd\u6570 […]","protected":false},"author":3,"featured_media":309986,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/309957"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=309957"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/309957\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/309986"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=309957"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=309957"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=309957"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}