printf("Hello, World!\n");
printf("%.1f\n",8.0/5.0);
printf("%.2f\n",8.0/5.0);
printf("%f\n",8.0/5.0);
printf("%.1f\n",8/5);
printf("%d\n",8.0/5.0);
Hello, World!
1.6
1.60
1.600000
1.6
4352
#include <stdio.h>
#include <math.h>
int main(int argc, const char * argv[]) {
printf("%.8f\n",1+2*sqrt(3)/(5-0.1));
return 0;
}
1.70695951
sqrt(x)计算算术平方根
#include <stdio.h>
int main(int argc, const char * argv[]) {
int a,b;
scanf("%d%d",&a,&b);
printf("%d\n",a+b);
return 0;
}
12
1
13
Program ended with exit code: 0
圆柱体的表面积
#include <stdio.h>
#include <math.h>
int main(int argc, const char * argv[]) {
const double pi = acos(-1.0);
double r, h, s1,s2,s;
scanf("%lf%lf",&r,&h);
s1 = pi*r*r;
s2 = 2*pi*r*h;
s = s1*2.0+s2;
printf("Area = %.3f\n",s);
return 0;
}
3.5
9
Area = 274.889
Program ended with exit code: 0
三位数反转
#include <stdio.h>
int main(int argc, const char * argv[]) {
int n;
scanf("%d",&n);
printf("%d%d%d\n",n%10,n/10%10,n/100);
return 0;
}
123
321
Program ended with exit code: 0
#include <stdio.h>
#include <math.h>
int main(int argc, const char * argv[]) {
int n,m;
scanf("%d",&n);
m = (n%10)*100+(n/10%10)*10+(n/100);
printf("%03d\n",m);
return 0;
}
250
052
Program ended with exit code: 0
234
432
Program ended with exit code: 0
交换变量
#include <stdio.h>
#include <math.h>
int main(int argc, const char * argv[]) {
int a,b,t;
scanf("%d%d",&a,&b);
t = a;
a = b;
b = t;
printf("%d %d\n",a,b);
return 0;
}
18 19
19 18
Program ended with exit code: 0
#include <stdio.h>
#include <math.h>
int main(int argc, const char * argv[]) {
int a,b;
scanf("%d%d",&a,&b);
a = a + b;
b = a-b;
a = a-b;
printf("%d %d\n",a,b);
return 0;
}
10
20
20 10
Program ended with exit code: 0
#include <stdio.h>
#include <math.h>
int main(int argc, const char * argv[]) {
int a,b;
scanf("%d%d",&a,&b);
printf("%d %d\n",b,a);
return 0;
}
20 10
10 20
Program ended with exit code: 0
keep it simple and stupid
鸡兔同笼
#include <stdio.h>
#include <math.h>
int main(int argc, const char * argv[]) {
int a,b,n,m;
scanf("%d%d",&n,&m);
a = (4*n-m)/2;
b = n - a;
if (m % 2 == 1 || a< 0 || b < 0)
{
printf("No Answer\n");
}else{
printf("%d %d\n",a,b);
}
return 0;
}
14 32
12 2
Program ended with exit code: 0
10 16
No Answer
Program ended with exit code: 0
三正数排序
#include <stdio.h>
#include <math.h>
int main(int argc, const char * argv[]) {
int a,b,c;
scanf("%d%d%d",&a,&b,&c);
if (a<b && b < c)
printf("%d %d %d\n",a,b,c);
if (a<c && c < b)
printf("%d %d %d\n",a,c,b);
if (b<a && a < c)
printf("%d %d %d\n",b,a,c);
if (b<c && c < a)
printf("%d %d %d\n",b,c,a);
if (c<a && a < b)
printf("%d %d %d\n",c,a,b);
if (c<b && b < a)
printf("%d %d %d\n",c,b,a);
return 0;
}
20
3
8
3 8 20
Program ended with exit code: 0
#include <stdio.h>
#include <math.h>
int main(int argc, const char * argv[]) {
int a,b,c;
scanf("%d%d%d",&a,&b,&c);
if (a<b && b < c)
printf("%d %d %d\n",a,b,c);
else if (a<c && c < b)
printf("%d %d %d\n",a,c,b);
else if (b<a && a < c)
printf("%d %d %d\n",b,a,c);
else if (b<c && c < a)
printf("%d %d %d\n",b,c,a);
else if (c<a && a < b)
printf("%d %d %d\n",c,a,b);
else
printf("%d %d %d\n",c,b,a);
return 0;
}
111
111
111
111 111 111
Program ended with exit code: 0
#include <stdio.h>
#include <math.h>
int main(int argc, const char * argv[]) {
int a,b,c,t;
scanf("%d%d%d",&a,&b,&c); //9 8 3
if (a>b)
{
t = a;
a = b;
b = t;
}// a<=b 8 9 3
if (a>c)
{
t = a;
a = c;
c = t;
} //a<=c,a<=b 3 9 8
if (b>c)
{
t = b;
b = c;
c = t;
} // 3 8 9
printf("%d %d %d\n",a,b,c);
return 0;
}
9
8
3
3 8 9
Program ended with exit code: 0
平均数
#include <stdio.h>
#include <math.h>
int main(int argc, const char * argv[]) {
int a,b,c;
scanf("%d%d%d",&a,&b,&c);
printf("%.3f\n",(a+b+c)/3.0);
return 0;
}
20
10
30
20.000
Program ended with exit code: 0
温度
#include <stdio.h>
#include <math.h>
int main(int argc, const char * argv[]) {
double f,c;
scanf("%lf",&f);
c = 5*(f-32)/9;
printf("%.3f\n",c);
return 0;
}
100
37.778
Program ended with exit code: 0
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