求高手进来用C语言编出一个数学计算器程序

用c语言编写一个数学计算式子~

#include
double u = (1 + a * pow(N - 1, 0.49) / sqrt(N);

是要两个程序吗？
第1个：
#include#include
double gs(double x,double T){ double temp; temp=15.5307-44.3977*x+80.9385*x*x+(-32597.5+122835*x+160757*x*x)/T; return temp;}
void main(void){ double P,x,lg_P,T; printf("Please input x:"); scanf("%lf",&x);A: printf("Please input T:"); scanf("%lf",&T); if(T==0)//分母不能为0，为0重输 goto A; lg_P=gs(x,T); P=pow(10,lg_P); printf("
lg_P=%.10f
",lg_P); printf("P=%e
",P);}


第2个：
#include#include
double g(double P){ double temp; temp=121.761+5.89e-7*(P-21.4e+5)-1e-15*(P*P-4.584e+10); return temp;}
double q(double x){ double temp; temp=-40.2-569.5*x+610.7*x*x; return temp;}
double y(double x,double t){ double temp; temp=1.52*t+2.54*x*t+(0.99*x-0.358)*1e-2*t*t; return temp;}
void main(void){ double h,P,t,x; printf("Please input P:"); scanf("%lf",&P); printf("Please input t:"); scanf("%lf",&t); printf("Please input x:"); scanf("%lf",&x); h=g(P)+q(x)+y(x,t); printf("h=%.20e
",h);}


补充第1题：
#include/* ------- 已知x,P,求T ------- */#include
double gs(double P,double x){ double temp1,temp2; temp1=log10(P); temp1=temp1-15.5307+44.3977*x-80.9385*x*x; temp2=-32597.5+122835*x+160757*x*x; temp2=temp2/temp1; return temp2;}
void main(void){ double P,x,T; printf("Please input x:"); scanf("%lf",&x);A: printf("Please input P:"); scanf("%lf",&P); if(P<=0)//对数底数不能小于等于0，小于等于0重输 { printf("'P' must be above 0 ,input again.
"); goto A; } T=gs(P,x); printf("T=%.20e
",T);}


#include/* ------- 已知P,T,求x ------- */#include
void gs(double P,double T){ double a,b,c,delta,x1,x2,tmp; a=80.9385-160757/T; b=122835/T-44.3977; c=15.5307-32597.5/T-log10(P); delta=b*b-4*a*c; printf("Result:
"); if(delta>0) { tmp=sqrt(delta); x1=(-b+tmp)/(2*a); x2=(-b-tmp)/(2*a); printf("delta>0,there are two answers:x1=%.20e , x2=%.20e
",x1,x2); } else if(delta==0) { x1=(-b)/(2*a); printf("delta=0,there is one answer:x1=x2=%.
",x1); } else { printf("delta,<0,there is no answer.
"); }}
void main(void){ double P,T;A: printf("Please input P:"); scanf("%lf",&P); if(P<=0)//对数底数不能小于等于0，小于等于0重输 { printf("'P' must be above 0 ,input again.
"); goto A; }B: printf("Please input T:"); scanf("%lf",&T); if(T==0)//分母不能为0，为0重输 { printf("'T' can not be 0 ,input again.
"); goto B; } gs(P,T);}

#include<stdio.h>

#include<math.h>

main()

{

      while(1)

 {

 int a,b,c;

 printf("请输入两个数，以逗号隔开
");

 scanf("%d,%d",&a,&b); 

 printf("选择算法
") ;

 printf(" 1.乘    2.除
 3.加    4.减
") ;

 scanf("%d",&c); 

 switch(c)

  {

   case 1:c=a*b;printf("结果为%d
",c);break;

   case 2:if(b==0)

             { printf("除数不能为0
");break;}

          else

          {c=a/b;

          printf("结果为%d
",c);break;}

   case 3:c=a+b;printf("结果为%d
",c);break;

   case 4:c=a-b;printf("结果为%d
",c);break;

  } 

 }

}

---

求高手进来用C语言编出一个数学计算器程序视频