C语言，三个数加减乘怎么做，要用三个函数调用

Question

C语言，三个数 加减乘 怎么做，要用三个函数调用，急

Answer 1

#include "stdio.h"
jia(int x1,int x2,int x3)
{ int s1;
s1=x1+x2+x3 ;
return s1;}
jian(int x11,int x22,int x33)
{ int s2;
s2=x11-x22-x33 ;
return s2;}

chen(int x111,int x222,int x333)
{ int s3;
s3=x111*x222*x333 ;
return s3;}
main()
{ int a,b,c,jia1,jian1,chen1,s;
printf("enter three number: ");
scanf("%d %d %d",&a,&b,&c);
printf("\n");
printf("enter you want computing: ");
scanf("%d",&s);
switch(s)
{case 1:printf("a+b+c=%d",jia1=jia(a,b,c));break;
case 2:printf("a-b-c=%d",jian1=jian(a,b,c));break;
case 3:printf("a*b*c=%d",chen1=chen(a,b,c));break;
default:printf("error."); }
}
哥们 改了啊 试试