文档介绍：二级考试(C语言)。#include<>voidswap(______1______)//int*pa,int*pb{/*交换两个数的位置*/inttemp;temp=*pa;*pa=*pb;*pb=temp;}voidmain(){inta,b,c,temp;scanf("%d%d%d",&a,&b,&c);if(a>b)swap(&a,&b);if(b>c)swap(&b,&c);if(______2______)//a>bswap(&a,&b);printf("%d,%d,%d",a,b,c);}。#include<>#include<>voidmain(){FILE*fp;floatn=1,t=1,pi=0;inti;//从以下开始答题i=1;while(fabs(t)>=1e-6){pi=pi+t;i=-i;n=n+2;t=i/n;}fp=fopen("","w");fprintf(fp,"%.6f",4*pi);fclose(fp);}运行结果:。#include<>voidmain(){charc;c=getchar();if(______1______)//c>='a'&&c<'v'c=c+5;elseif(c>='v'&&c<='z')______2______//c=c-21;putchar(c);}。#include<>#include<>voidmain(){floaty=;intn=1;FILE*p;//以下开始做答while(!(pow(y,n)<1e6&&pow(y,n+1)>1e6)) n++;p=fopen("","w");fprintf(p,"%d,%.0f",n,pow(,n));fclose(p);}运行结果:283,。#include<>voidmain(){intm=0,t=1,n;while(_____1________);//(scanf("%d",&n),n<=0)while(!(t<=n&&t*2>=n)){_____2_____//t=t*2;m++;}printf("%d\n",m);}。#include<>#include<>#definelen(x1,y1,x2,y2)sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2))voidmain(){FILE*p;inti,j;floatc,minc;floatx[]={,,-,,,-,,,,};floaty[]={-6,,,,,,,-,,-};minc=len(x[0],y[0],x[1],y[1]);p=fopen("","w");for(i=0;i<9;i++) for(j=i+1;j<10;j++) if((c=len(x[i],y[i],x[j],y[j]))<minc) minc=c;fprintf(p,"%f",minc);fclose(p);}运行结果:。#include<>_______1______//longf(intn);voidmain(){printf("%ld\n",f(30));}longf(intn){if(______2______)//n==1||n==2return1;elsereturnf(n-1)+f(n-2);}运行结果:。#include<>#include<>voidmain(){FILE*p;inti;floatx=,t=1,y=0;floata[10]={,,-,,,-,,,,};p=fopen("","w");y=a[0];for(i=1;i<10;i++){t=t*x;y=y+t*a[i];}fprintf(p,"%f",y);fclose(p);}运行结果:。#include<>voiditoa(longi,char*s){if(i==0)return;/******1******/*s='1'+i%10; //*s='0'+i%10itoa(i/10,s-1);}voidm