{"author_name":"nojikaba","description":"#include <stdio.h> #include <math.h> int main(int argc,char* argv[]){ char buffer[80]; double a,b,c,s,temp,area; fgets(buffer,80,stdin); sscanf(buffer,\"%lf %lf %lf\",&a,&b,&c); s = (a + b + c)/2; temp = s*(s-a)*(s-b)*(s-c); area = sqrt(temp); printf(\"%lf\\n\",area); } \u306a\u3093\u3066\u3053\u3068\u306a\u3044\u30d7\u30ed\u30b0\u30e9\u30e0\u3067\u3059\u304c\u3001\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306b undefined \u2026","blog_title":"\u8def\u5730\u88cf\u30ab\u30b8\u30ce","provider_url":"https://hatena.blog","title":"\u30d8\u30ed\u30f3\u306e\u516c\u5f0f\u3067\u4e09\u89d2\u5f62\u306e\u9762\u7a4d\u3092\u6c42\u3081\u308b","image_url":null,"categories":["c\u8a00\u8a9e"],"provider_name":"Hatena Blog","type":"rich","url":"https://nojikaba.hatenadiary.org/entry/20151115/1447610075","blog_url":"https://nojikaba.hatenadiary.org/","published":"2015-11-15 02:54:35","width":"100%","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fnojikaba.hatenadiary.org%2Fentry%2F20151115%2F1447610075\" title=\"\u30d8\u30ed\u30f3\u306e\u516c\u5f0f\u3067\u4e09\u89d2\u5f62\u306e\u9762\u7a4d\u3092\u6c42\u3081\u308b - \u8def\u5730\u88cf\u30ab\u30b8\u30ce\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","author_url":"https://blog.hatena.ne.jp/nojikaba/","version":"1.0","height":"190"}