#include<stdio.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);
return 0;
}
#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;
}
#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("%f,%lf",&x,&y);
printf("%f,%lf\n",x,y);
return 0;
}
#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')||(x>'a'&&x<'z'))
printf("%c是英文字母\n",x);
else
printf("%c是其它字符\n",x);
return 0;
}
#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("动手敲代码了没?(入y或Y表示敲了,输入n或N表示没敲):");
ans2 = getchar();
if((ans1=='y'||ans1=='Y')&&(ans2=='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;
}
#include<stdio.h>
#include<math.h>
int main(){
int q = 2, a1 = 2;
int n,sum;
scanf("%d",&n);
sum = a1 * (1 - pow(q,n))/(1 - q) + 1;
printf("n = %dʱ, sum = %d\n",n,sum);
return 0;
}