一、编程题5.17、#include"stdio.h"voidmain(){inti,s,t;i=1;s=0;t=1;while(i<=101){s=s+i*t;i=i+2;t=-t;}printf("%d\n",s);}5.18、(1)#include"stdio.h"voidmain(){inti;floats,t;s=2.0;t=1.0;for(i=1;i<=48;i++){t=t*(t+1);s=s+1/t;}printf("%f\n",s);}(2)#include"stdio.h"#include"math.h"voidmain(){floate,t,s;e=2.0;t=1.0;s=1.0;while(fabs(s)>=1e-6){t=t*(t+1);s=1/t;e=e+s;}printf("%f\n",e);}5.19、#includevoidmain(){inti,j=0;for(i=2000;i<=3000;i++)if(i%4==0&&i%100!=0||i%400==0){printf("%d",i);j++;if(j%10==0)printf("\n");}}5.20、所编程序如下#include"stdio.h"voidmain(){inti,j,k;for(i=1;i<=4;i++){for(j=1;j<=4-i;j++)printf("");for(k=1;k<=2*i-1;k++)printf("*");printf("\n");}for(i=1;i<=4;i++){for(j=1;jb){t=a;a=b;b=t;}if(a>c){t=a;a=c;c=t;}if(b>c){t=b;b=c;c=t;}printf("MAX=%d\n",c);}4.25(1)、#include"stdio.h"voidmain(){intx,y;printf("Enteranumber:");scanf("%d",&x);if(-50){if(x<10)y=x+1;printf("y=%d\n",y);}}4.25(3)、#include"stdio.h"voidmain(){intx,y;printf("Enteranumber:");scanf("%d",&x);if(-5
