程序设计1./*------------------------------------------------【程序设计】--------------------------------------------------功能：能计算从1开始到n的自然数的和，n由键盘输入，并在main()函数中输出。------------------------------------------------*/#include"stdio.h"intfun(intn){/*********Begin**********//**********End**********/}main(){intm;voidTestFunc();printf("Enterm:");scanf("%d",&m);printf("\nTheresultis%d\n",fun(m));TestFunc();}voidTestFunc(){FILE*IN,*OUT;intt;into;intc;IN=fopen("in.dat","r");if(IN==NULL){printf("ReadFileError");}OUT=fopen("out.dat","w");if(OUT==NULL){printf("WriteFileError");}for(c=1;c<=5;c++){fscanf(IN,"%d",&t);o=fun(t);fprintf(OUT,"%d\n",o);}fclose(IN);fclose(OUT);}2./*------------------------------------------------【程序设计】--------------------------------------------------功能：调用函数fun判断一个三位数是否"水仙花数"。在main函数中从键盘输入一个三位数，并输出判断结果。请编写fun函数。说明：所谓"水仙花数"是指一3位数，其各位数字立方和等于该数本身。例如：153是一个水仙花数，因为153=1+125+27。------------------------------------------------*/#include"stdio.h"intfun(intn){/*********Begin**********//**********End**********/}TestFunc(){FILE*IN,*OUT;intiIN,i;intiOUT;IN=fopen("in.dat","r");if(IN==NULL){printf("PleaseVerifyTheCurrerntDir..ItMayBeChanged");}OUT=fopen("out.dat","w");if(OUT==NULL){printf("PleaseVerifyTheCurrentDir..ItMayBeChanged");}for(i=0;i<10;i++){fscanf(IN,"%d",&iIN);iOUT=fun(iIN);fprintf(OUT,"%d\n",iOUT);}fclose(IN);fclose(OUT);}main(){intn,flag;scanf("%d",&n);flag=fun(n);if(flag)printf("%d是水仙花数\n",n);elseprintf("%d不是水仙花数\n",n);TestFunc();}答案1.intsum=0,i;for(i=1;i<=n;i++)sum=sum+i;return(sum);2.intbw,sw,gw;bw=n/100;sw=(n-bw*100)/10;gw=n%10;if(n==bw*bw*bw+sw*sw*sw+gw*gw*gw)return1;elsereturn0;程序改错1./*------------------------------------------------------【程序改错】--------------------------------------------------------功能：有一数组内放10个整数,要求找出最小数和它的下标,然后把它和数组中最前面的元素即第一个数对换位置.------------------------------------------------------*/#include"stdio.h"mai