实验结论
1、实验任务1
#include <stdio.h> int main(){ int num; scanf("%d", &num); printf("2049%04d\n", num); scanf("%d",&num); printf("2049%04d\n", num); scanf("%d", &num); printf("2049%04d\n", num); return 0; }
2、实验任务2
#include <stdio.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("%1f\n",m); printf("%3c\n", ch); printf("%s\n%15s\n%10.5s\n%2.5s\n%.3s\n",a,a,a,a,a); return 0; }
3、实验任务3
#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; }
4、实验任务4
#include <stdio.h> int main(){ char ans1, ans2; printf("复习了没?(输入y或Y表示复习了,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Y表示敲了,输入n或N表示没有敲):"); ans2 = getchar(); if(ans1=='y'&&ans2=='y'||ans1=='Y'&&ans2=='Y'||ans1=='y'&&ans2=='Y'||ans1=='Y'&&ans2=='y') printf("\n罗马不是一天建成的:)\n"); else printf("\n罗马不是一天毁灭的。。。\n"); return 0; }
5、实验任务5
#include <stdio.h> int main(){ char x; x = getchar(); if(x>='0'&&x<='9') printf("%c是数字字符\n", x); else if(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; }
6、实验任务6
#include <stdio.h> int main(){ int n,sum,i,a; sum = 1; i = 1; a = 2; scanf("%d",&n); while(i<=n){ sum+=a; a=a*2; i+=1; } printf("n = %d时,sum = %d\n",n,sum); return 0; }