实验二 C语言表达式编程应用及输入输出函数
实验任务1
//ex1.cpp #include <stdio.h> #include<stdlib.h> int main(){ int a=5, b=7, c=100, d, e, f; d = a/b*c; e = a*c/b; f = c/b*a; printf("d=%d, e=%d, f=%d\n",d,e,f); system("pause"); return 0; }
运算符*的优先级为2,运算符/优先级为3,先运算*(此为用VS2010敲的代码,之后为DEV C++)
ex2.cpp
//ex2.cpp #include<stdio.h> #include<stdlib.h> int main(){ int x=1234; float f=123.456; double m=123.456; char ch='a'; char a[]="Hello,world!"; int y=3,z=4; printf("%d %d\n",y,z); printf("y=%d, z=%d\n",y,z); printf("%8d,%2d\n",x,x); printf("%f, %8f, %8.1f, %0.2f, %.2e\n",f,f,f,f,f); printf("%lf\n",m); printf("%3c\n",ch); printf("%s\n%15s\n%10.5s\n%2.5s\n%.3s\n",a,a,a,a,a); system("pause"); return 0; }
ex3.cpp
//ex3.cpp #include<stdio.h> int main(){ double x,y; char c1,c2,c3; int a1,a2,a3; scanf("%d%d%d",&a1,&a2,&a3); printf("%d,%d,%d\n",a1,a2,a3); scanf("%c%c%c",&c1,&c2,&c3); printf("%c%c%c\n",c1,c2,c3); scanf("%lf,%lf",&x,&y); printf("%f,%lf\n",x,y); return 0; }
ex4.cpp
//ex4.cpp #include<stdio.h> int main(){ char x; x=getchar(); if(x>='0'&&x<'9') printf("%c是数字字符\n"); else if(x>='A'&&x<='Z'||x>='a'&&x<='z') printf("%c是英文字母\n",x); else printf("%c是其他字符\n",x); return 0; }
ex5.cpp
//ex5.cpp #include <stdio.h> int main(){ char ans1,ans2; printf("复习好了没?(输入y或Y代表复习了,输入n或N表示没复习)"); ans1 = getchar(); getchar() ; printf("\n动手敲代码了没?(输入y或者Y表示敲了,输入n或N表示木有敲):"); ans2 = getchar(); if(ans1=='y'||ans1=='Y'&&ans2=='n'||ans2=='N') printf("\n罗马不是一天建成的:)"); else printf("\n罗马不是一天毁灭的。。。\n") ; return 0; }
ex6.cpp
//ex6.cpp #include<stdio.h> #include<math.h> int main(){ const int x=2; int sum; double n; printf("请输入一个1~10的n:\n"); scanf("%lf",&n); sum=1*(1-pow(x,n+1))/(1-x); printf("n=%lf,sum=%d",n,sum); return 0; }
任务六为请教同学所作。
任务七暂时不会。
posted on 2020-11-05 19:50 helianthus-JUN 阅读(187) 评论(1) 编辑 收藏 举报