c – 当我尝试为我的程序提供3个输入时,它需要4才能正常运行.这
发布时间:2020-12-16 09:22:41 所属栏目:百科 来源:网络整理
导读:#include stdio.h#include stdlib.h #define f(x) (1 / (x*x+1))int main(){ double a,b,h,x,y; printf("Enter a,h: "); scanf(" %lf %lf %lf ",a,b,h);// I ask for 3 inputs but the programm needs 4 to run...why is that? x = a; while(xb) { y = f(x);
#include <stdio.h> #include <stdlib.h> #define f(x) (1 / (x*x+1)) int main(){ double a,b,h,x,y; printf("Enter a,h: "); scanf(" %lf %lf %lf ",&a,&b,&h); // I ask for 3 inputs but the programm needs 4 to run...why is that? x = a; while(x<b) { y = f(x); printf("%lf %lf n",y ); x +=h; } system("Pause"); return(0); } 解决方法
问题出在你的scanf上:
scanf(" %lf %lf %lf ",&h); ^ scanf需要查看下一个非空格来确定这个“0或更多空格”的结束,所以你必须给第四个值(它可以是垃圾 – 只要它不是空格),以便scanf终止输入. 如果您在Windows上,可以在新行上按Ctrl-Z并按Enter键.这将向程序发送EOF,也可以终止输入. (我想你是在Windows上,因为我在你的程序中看到了系统(“暂停”)) (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |