c语言程序简单例子.doc

1、求1+2+3+……….+100。(循环)答案#include<>voidmain(){inti,sum=0;for(i=1;i<=100;i++)sum=sum+i;printf("%d",sum);}2、求1*2*3*……….*10。(循环)答案voidmain(){inti=0,j=1;for(i=2;i<=10;i++){j*=i;}printf("%d",j);return0;}3、输入三个数字,输出他们的最大值。(if)答案#include<>voidmain(){inta,b,c,d;scanf("%d,%d,%d",&a,&b,&c);d=max(a,b,c);printf("max=%d",d);getch();/*暂停看运行结果*/}intmax(intx,inty,intz){intu;if(x>=y&&x>=z)u=x;elseif(y>=x&&y>=z)u=y;elseu=z;return(u);(数组实现)答案#include<>main(){inti,j,t;staticinta[10]={5,7,4,2,3,6,1,0,9,8};for(j=0;j<9;j++){for(i=0;i<9-j;i++){if(a[i]>a[i+1]){t=a[i];a[i]=a[i+1];a[i+1]=t;}}}for(i=0;i<10;i++)printf("%2d",a[i]);}5、输入十个数字,逆序输出。(数组实现)答案#include<>main(){inta[10],i=0;for(i=0;i<=9;i++)scanf("%f",&a[i]);printf("\n");for(i=9;i>=0;i--)printf("%f",a[i]);}6输入两个数,交换他们的值并输出。(元素交换)答案#include<>intmain(){intm,n,temp;scanf("%d%d",&m,&n);if(m<n){temp=m;m=n;n=temp;}printf("%d",m);return0;}*9乘法表。(双层循环)答案#include<>voidmain(){inti=1;for(i;i<=9;i++){intj=1;for(j;j<=i;j++){printf("%d*%d=%d",i,j,i*j);}printf("\n");}},将所有的小写字母转换成大写字母,大写字母转换成小写字母,其余字符不变。输出转变后的这行字符。答案#include""voidmain(){chara[n];inti;scanf("%s",a);printf("大写为:");for(i=0;i<=n;i++){if(a[i]<='z'&&a[i]>='a')a[i]=a[i]-32;printf("%c",a[i]);}printf("\n小写为:");for(i=0;i<=3;i++){a[i]=a[i]+32;printf("%c",a[i]);}}9、编写一个简单计算器程序,要求能够完成两个数的+,-,*,/四种运算。输出运算式及运算结果。(switch)#include"stdio.