.1求两个数的和与差输入整数a和b，计算并输出a、b的和与差.#includeintmain(){inta,b,sum,diff;scanf("%d%d",&a,&b);sum=a+b;diff=a-b;printf("Thesumis%d\n",sum);printf("Thedifferenceis%d\n",diff);}2求平方根输入1个实数X，计算井输出其平方根(保留1位小数).(例:输入17;输出Thesquarerootof17.0is4.1)#include#includeintmain(){doublex,root;scanf("%lf",&x);root=sqrt(x);printf("Thesquarerootof%fis%0.1f\n",x,root);}3华氏温度转换为摄氏温度输入华氏温度f，计算并输出相应的摄氏温度c(保留2位小数).c=5/9(f-32).(例z括号内是说明输入17.2(华氏温度)输出Thctempratureis-8.22)#includeintmain(){doublef,c;scanf("%lf",&f);c=5.0/9.0*(f-32.0);printf("Thetempratureis%0.2f\n",c);}4计算旅途时间输入2个整数time1和time2.表示火车的出发时间和到达时间，计算并输出旅途时间.有效的时间范围是0000到2359，不需要考虑出发时间晚于到达时间的情况.#includeintmain(){inttime1,time2,hours,mins;scanf("%d%d",&time1,&time2);time1=time1/100*60+time1%100;time2=time2/100*60+time2%100;hours=(time2-time1)/60;mins=(time2-time1)%60;printf("Thetrainjourneytimeis%dhrs%dmins.\n",hours,mins);}5大写字母转换成小写字母输入一个大写英文字母，输出相应的小写字母.例:输入G输出g#includeintmain(){charch;scanf("%c",&ch);ch=ch-'A'+'a';printf("%c\n",ch);}.6显示两级成绩输入一个正整数repeat(0intmain(){intmark;scanf("%d",&mark);if(mark>59)printf("Pass\n");elseprintf("Fail\n");}7找最小值#includeintmain(){inta,b,c,d,min;scanf("%d%d%d%d",&a,&b,&c,&d);min=a;if(min>b)min=b;if(min>c)min=c;if(min>d)min=d;printf("minis%d\n",min);}8求三角形面积和周长输入三角形的三条边a，b，c.如果能构成一个三角形，输出面积area和周长perimete保留2位小数);否则，输出(Thesesidesdonotcorrespondtoavalidtriangle".在一个三角形中，任意两边之和大于第三边.#include#includeintmain(){floata,b,c,area,perimeter,s;scanf("%f%f%f",&a,&b,&c);if(a+b>c&&a-bintmain(){intx,y;scanf("%d",&x);if(x<0)y=-1;elseif(x>0)y=1;elsey=0;printf("y=%d\n",y);}10显示水果价格.以下4种水果的单价分别是3.00元/公斤,2.50元/公斤,4.10元/公斤,10.20元/公斤.[1]apples[2]pears[3]oranges[4]grapes输入水果的编号，输出该水果的单价(保留2位小数).如果输入不正确的编号，显示单价为0.#includeintmain(){intchoice;floatprice;printf("[1]apples\n");printf("[2]pears\n");printf("[3]oranges\n");printf("[4]grapes\n");scanf("%d",&choice);price=(choice==1)*3+(choice==2)*2.50+(choice==3)*4.1+(choice==4)*10.2;printf("price=%0.2f\n",price);}11读入1个正整数n(n<=100)，计算并输出1+1/2+1/3+......+1/n(保留3位小数).#includeintmain(){inti,n;floatsum;scanf("%d",&n);sum=0;for(i=1;i<=n;i++)sum=sum+1.0/i;printf("%0.3f\n",sum);}12求n的阶乘#includeintmain(){inti,n;doublefact;scanf("%d",&n);fact=1;for(i=1;i<=n;i++){fact=fact*i;}printf("%0.0f\n",fact);}13求X的n次幂#includeintmain(){inti,n;doublex,mypow;scanf("%lf%d",&x,&n);mypow=1;for(i=1;i<=n;i++)mypow*=x;printf("%.2f\n",mypow);}14摄氏华氏转换表#includeintmain(){intbegin,c,end,f;.scanf("%d%d",&begin,&end);printf("CelsiusFahrenheit\n");for(c...
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