c语言计算分段函数概念 c语言计算分段函数例题

用C语言计算分段函数

#include "stdio.h"

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#includemath.h

void main()

{

double x,y,f,h;

printf("请输入x:\n");

scanf("%lf",x);

printf("请输入y:\n");

scanf("%lf",y);

if((x=0)(y0))

f=2*pow(x,2)+3*x+1/x+y;

else if((x=0)(y=0))

f=2*x*x+3*x+1/x+y*y;

else

f=3*sin(x+y)/2/pow(x,2)+3*x+1;

printf("x=%lf,y=%lf,f=%lf\n",x,y,f);

h=pow(x,2);

printf("%lf",h);

}

c语言分段函数

写法1

if (x-5 x0) y = x;

if (x == 0) y=x-1;

if (x0 x10) y = x+1;

写法2

if (x-5 x10)

{

y=x; //在这个范围,不论怎样,先把y赋值为x

if (x=0) //在这个范围,需要对y值做修改

{

y = y-1; //先把y-1再说,对应x=0的情况,如果x!=0,那么我们再次修改

if(x0)

y = y+2; //刚刚y-1了,所以需要+2

}

}

写法3,终于是正常点的做法了

if (x-5 x0) y=x;

else

{

if (x10)

{

if (x==0) y=x-1;

else y=x+1;

}

}

写法4

switch(x)

{

case 0:

y=x-1;

break;

case -4;

case -3;

case -2;

case -1;

y=x;

break;

case 1;

case 2;

case 3;

case 4;

case 5;

case 6;

case 7;

case 8;

case 9;

y=x+1;

break;

}

C语言 定义调用函数 求分段函数

int sign(int x)

{

int y;

scanf("%d",x);

if(x0)

y=1;

else if(x==0)//判断语句是==不是=号

y=0;

else

y=-1;

return y;

}

C语言计算分段函数

1. 代码如下,3)需要实际运行时输入测试

int main(void)

{

double x, y, f;

printf("Please input 2 double number in the form of x y:\n");

scanf("%lf%lf", x, y);

if(x=0 y0)

f = 2*x*x + 3*x +1/(x+y);

else if(x=0 y=0)

f = 2*x*x + 3*x +1/(1+y*y);

else

f = 3*sin(x+y)/(2*x*x) + 3*x + 1;

printf("x=%lf, y=%lf, f(x, y)=%lf\n", x, y, f);

return 0;

}

2.代码如下

#include stdio.h

#includemath.h

int main(void)

{

double x, y, f;

printf("Please input 2 double number in the form of x y:\n");

scanf("%lf%lf", x, y);

if(x=0)

{

if(y0)

f = 2*x*x + 3*x +1/(x+y);

else

f = 2*x*x + 3*x +1/(1+y*y);

}

else

f = 3*sin(x+y)/(2*x*x) + 3*x + 1;

printf("x=%lf, y=%lf, f(x, y)=%lf\n", x, y, f);

return 0;

}

3.代码如下

#include stdio.h

int main(void)

{

int score = 0;

printf("Please input a score between 0-100:\n");

scanf("%d", score);

if(score0 || score100)

printf("Wrong input of score!\n");

else if(score=90 score=100)

printf("A\n");

else if(score=80 score=89)

printf("B\n");

else if(score=70 score=79)

printf("C\n");

else if(score=60 score=69)

printf("D\n");

else

printf("E\n");

return 0;

}


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