C语言编程，输入三个双精度的数，求他们的平均值后，保留小数点后一位，并对第二位按四舍五入的方式输出 C语言中怎样输入一个双精度数，对小数点后第2位进行四舍五入，...
\uff1f\uff1f\uff1f\u7528C\u8bed\u8a00\u7f16\u5199\uff1a\u8bfb\u5165\u4e09\u4e2a\u53cc\u7cbe\u5ea6\u6570\uff0c\u6c42\u5e73\u5747\u503c\u4fdd\u7559\u5c0f\u6570\u70b9\u540e\u4e00\u4f4d\u5bf9\u5c0f\u6570\u70b9\u540e\u7b2c\u4e8c\u4f4d\u56db\u820d\u4e94\u5165\u8f93\u51fa\u7ed3\u679cls\u7684\u6ca1\u6709\u505a\u56db\u820d\u4e94\u5165\u5904\u7406\u3002
#include
main()
{
double a,b,c,rzt;
scanf("%lf%lf%lf",&a,&b,&c);
rzt=(a+b+c)/3;
rzt=(int)(rzt*10+0.5)/10.0; //\u56db\u820d\u4e94\u5165\u5904\u7406
printf("%.1lf\n",rzt);
}
#include
int main()
{
double a;
scanf("%lf",&a);
printf("%.1lf\n",a);
return 0;
}
int main()
{
double a,b,c,ans;
scanf("%lf%lf%lf",&a,&b,&c);
ans=(a+b+c)/3;
printf("%.1lf\n",ans);//格式化输出1位小数，后面自动四舍五入的
return 0;
}
用双精度控制小数点后2位就可以了，自动四舍五入！
绛旓細ans=(a+b+c)/3;printf("%.1lf\n",ans);//鏍煎紡鍖栬緭鍑1浣嶅皬鏁帮紝鍚庨潰鑷姩鍥涜垗浜斿叆鐨 return 0;}
绛旓細printf ("%g+%g+%g=%g\n",a,b,c,a+b+c);printf ("(%g+%g+%g)/3=%g,A+B+C鐨勫钩鍧囧间负%g\n",a,b,c,(a+b+c)/3,(a+b+c)/3);printf ("%g^2+%g^2+%g^2=%g\n",a,b,c,a*a+b*b+c*c);printf ("%g^2+%g^2+%g^2鐨勫紑璺熶负%g\n",a,b,c,sqrt(a*a+b*b+...
绛旓細include<stdio.h>void main(){ int i,j; double x,y,z,ave; printf("璇杈撳叆涓変釜鏁:"); scanf("%lf %lf %lf",&x,&y,&z); ave=(x+y+z)%3.0; i=ave*100; i=i%10;//寰楀埌灏忔暟鐐圭櫨鍒嗕綅涓鐨勬暟 j=ave*10; if(i>=5){ j+=1; ave=(dou...
绛旓細printf("璇杈撳叆涓変釜鍙岀簿搴︾殑鏁:\n");scanf("%lf",&a);scanf("%lf",&b);scanf("%lf",&c);sum=(a+b+c)/3.0;g=sum*100;d=(int)g;e=d%10;f=d/10;if(e>4)sum=(f*10.0+10)/100.0;else sum=(f*10.0)/100.0;printf("%lf\n",sum);} C璇█绋嬪簭 ...
绛旓細include <stdio.h> int main(){ double x,y,z,avr;printf("Enter x,y,z:\n");scanf("%lf%lf%lf",&x,&y,&z);avr=(x+y+z)/3;avr=avr*10;avr=avr+0.5;avr=(int)avr;avr=avr/10;printf("avr=%f\n",avr);}
绛旓細include <iostream> using namespace std;int main (){ double sum = 0;double share = 0;double temp;for (int i = 0; i < 3; i++) { cin >> temp;sum += temp;share += temp*temp;} cout << sum << endl;cout << share << endl;system ("pause");return 0;} ...
绛旓細include<stdio.h> double maxdata(double x, double y, double z){ double maxnum= x>y ? x : y;return (maxnum= maxnum>z ? maxnum : z);} main(){ printf("鏈澶鐨勬暟涓猴細%lf\n", maxdata(2.5, 56.7, 34.9) );} ...
绛旓細VC绋嬪簭濡備笅锛歩nclude<stdio.h> main(){ double a,b,c,ave;printf("璇杈撳叆涓変釜鍙岀簿搴︽暟锛歕n\n");scanf("%f,%f,%f锛&a,&b,&c);printf("涓夋暟鐨骞冲潎鏁颁负锛歕n");ave=(a+b+c)/3.0;printf("%5.1f",ave);}
绛旓細printf("璇杈撳叆涓変釜鍙岀簿搴鏁:");scanf("%lf%lf%lf",&a,&b,&c);aver=(a+b+c)/3.0;h=(aver*100+5)/10;aver=(float)h/10;printf("瀵瑰畠浠殑骞冲潎鍊间繚鐣欏皬鏁扮偣鍚庝竴浣嶄负:%f",aver);}*/ /*4锛缂栧啓绋嬪簭锛璇诲叆涓変釜鏁存暟缁檃銆乥銆c锛岀劧鍚庝氦鎹㈠畠浠腑鐨勬暟锛屾妸a涓師鏉ョ殑鍊肩粰b锛屾妸b涓...
绛旓細棣栧厛璇诲叆double瑕%lf鐒跺悗杈撳嚭鐨勬椂鍊欓渶瑕佽缃繚鐣欎綅鏁板惁鍒欏鏋滄病鏈夊皬鏁扮殑璇濆氨鏄緭鍑烘暣鏁皃rintf("a+b=%.6lf",a);灏辨槸淇濈暀6浣%f瀵瑰簲鐨勬槸鍗绮惧害鐨floatdouble蹇呴』鐢%lf杈撳嚭鐨勬椂鍊欐槸浼氭妸double杞崲鎴恌loat杈撳嚭鐨勪絾鏄杈撳叆涓嶈兘
