#include
int main( )
{ int i,j;
for(i=1;i<=4;i++)
{
for(j=1;j<=__________;j++)
{
printf("*");
}
printf("\n");
}
return 0;
} 
#include
#include
int main()
{
int n = 1, count = 1;
________________;
double term = 1.0;
while (fabs(term) >= 1e-5) //判末项大小
{
______________; //求出累加项
e = e + term; //累加
n++; // 计算下一项
_______________; //统计累加项数
}
printf("e = %f, count = %d\n", e, count);
return 0;
}
" />#include
int main()
{
int i, j, k, n;
printf("result is:");
for (n=100; ________; n++)
{
i = n / 100; //分离出百位
j = ____________; //分离出十位
k = ____________; //分离出个位
if (_________________________)
{
printf("%d\t ",n); //输出结果
}
}
printf("\n");
return 0;
}
" />#include
int main()
{
int x=1, y=0, a=0, b=0;
switch(x)
{
case 1:
switch(y)
{
case 0: a++;
case 1: b++;
}
case 2: a++;
b++;
}
printf("a=%d, b=%d\n", a, b) ;
return 0;
}
" />#include
int main()
{
int k;
scanf("%d",&k);
switch(k)
{
case 1: printf("%d",k++);
case 2: printf("%d",k++);
case 3: printf("%d",k++);
break;
default: printf("Full!");
}
return 0;
}
" />#include
#include
int main()
{
int x;
double y;
printf("Input x: ");
scanf("%d", &x); // 输入一个整数
if (x > 0)
{
y = exp(-x); //如果大于0，计算y=exp(-x)的值
}
_____________
{
y = 1; //x=0，则y=1
}
else
{
y = -exp(x); //x<0，则y=-exp(x)
}
printf("y=%f\n", y);
return 0;
}
" />#include
#include
#include
#define EPS 1e-6
int main()
{
float a, b, c, disc, p, q;
printf("Please enter the coefficients a,b,c:");
scanf("%f,%f,%f", &a, &b, &c);
_________________________________ /* a=0时，输出"不是二次方程" */
{
printf("It is not a quadratic equation!\n");
exit(0); /* C标准库函数，用于终止整个程序的执行，强制返回操作系统 */
}
disc = b * b - 4 * a * c; /* 计算判别式 */
p = - b / (2 * a);
q = sqrt(fabs(disc)) / (2 * a);
if (fabs(disc) EPS) /* 判别式大于0时，输出两不等实根 */
{
printf("x1 = %.2f, x2 = %.2f\n", p+q, p-q);
}
else /* 判别式小于0时，输出两共轭复根 */
{
printf("x1 = %.2f+%.2fi, ", p, q);
printf("x2 = %.2f-%.2fi\n", p, q);
}
}
return 0;
}
" />#include
#include
int main()
{
float a, b, c;
float s, area;
printf("Input a,b,c:");
scanf("%f,%f,%f",&a,&b,&c);
if (a+b>c && b+c>a && a+c>b)
{
s = 1/2 * (a + b + c);
area = sqrt(s * (s - a) * (s - b) * (s - c));
printf("area=%.2f\n", area);
}
else
{
printf("It is not a triangle\n");
}
return 0;
}
" />#include
int main()
{
char c;
printf("Please input a character:");
scanf("%c",&c);
if(c >='A'&&c <= 'Z')
c =_______________;
printf("%c\n",c);
return 0;
}
#include
int main()
{
int a,b;
printf("please input a and b:\n");
scanf("%d%d",&a,&b);
printf("the output data is %d\n",a<b?b:a);
return 0;
}从键盘输入以下数据：27则程序输出为
#include
int main()
{
int m;
printf("Input m: ");
scanf("%d", &m); //输入一个整数
if (m > 0) //是否为正数
{
if (m % 2 == 0) //是正数，且能被2整除，则是正偶数
{
printf("%d is a positive even\n", m);
}
else //不能被2整除，则是正奇数
{
printf("%d is a positive odd\n", m);
}
}
_______________ //判断是否为负数
{
_______________
{
printf("%d is a negative even\n", m); //是负偶数
}
else
{
printf("%d is a negative odd\n", m); //是负奇数
}
}
else
{
printf("%d is zero.It is an even\n", m);
}
return 0;
}
" />#include
int main()
{
int a=1,b=0;
switch (a)
{
case 1:
switch (b)
{
case 0: printf("**0**");break;
case 1: printf("**1**");break;
}
case 2: printf("**2**");break;
}
return 0;
}
#include
int main()
{
int a=1,b=2,m=0,n=0,k;
k=(n=b>a)||(m=a<b);
printf("%d,%d\n",k,m);
return 0;
} 
#include
int main()
{
int a,b,c;
a=10;
b=20;
c=(a%b1);
printf("%d,%d,%d",a%b,a/b,c);
return 0;
}