计算机软件基础一 小抄,计算机软件基础小抄.doc

1编写一个C程序，输入a,b,c三个值，输出其中最大者*/

main()

{float a,b,c,max;

printf("please input three numbers:\n");

scanf("%f%f%f",&a,&b,&c);

if(a>=b) max=a;

else max=b;

if(max

printf("the max is: %f\n",max);

}

2两个瓶子分别装醋和酱油，要求互换，实际就是交换两变量*/

main()

{int a,b,t;

printf("please input two integer numbers:\n");

scanf("%d%d",&a,&b);

printf("before swap:a=%d,b=%d\n",a,b);

t=a; a=b; b=t;

printf("after swap:a=%d,b=%d\n",a,b);

}

3依次将10个数输入，要求打印其中最大的数*/

main()

{float num,max,n=1;

printf("please input a number:\n");

scanf("%f",&num);

max=num;

while(n<=9)

{printf("please input a number:\n");

scanf("%f",&num);

if (num>max) max=num;

n=n+1; }

printf("the max=%f\n",max);

}

4有3个数a,b,c，要求按大小顺序把它们打印出来*/

main()

{float a,b,c,t;

printf("please input three numbers:\n");

scanf("%f%f%f",&a,&b,&c);

printf("before sort:a=%g,b=%g,c=%g\n",a,b,c);

if(a>b) {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("after sort:a=%g,b=%g,c=%g\n",a,b,c);

}

5有3个整数a，b，c，由键盘输入，输出其中最大的数*/

main()

{int a,b,c,max;

printf("please input three integer numbers:\n");

scanf("%d%d%d",&a,&b,&c);

if(a<=b) max=b;

else max=a;

if(max

printf("max=%d\n",max);

}

求1+2+3+...+100*/

main()

{int sum=0,i=1;

while(i<=100)

{sum=sum+i;

i=i+1;

}

printf("1+2+3+...+100=%d\n",sum);

}

6、/*判断一个数n能否同时被3和5整除*/

main()

{int n;

printf("please input a integer number:\n");

scanf("%d",&n);

if((n%3==0)&&(n%5==0)) printf("%d can be divided by both 3 and 5\n",n);

else printf("%d can't be divided by both 3 and 5\n",n);

}

7、将100到200之间的素数打印出来*/

#include "math.h"

main()

{int num=100,i,flag;

printf("the prime number from 100 to 200:\n");

while(num<=200)

{i=2;flag=0;

while(i<=sqrt(num))

{if(num%i==0) flag=1;

i=i+1; }

if(flag==0) printf("%4d",num);

num=num+1;

}

printf("\n");

}

8、/*求两个数m和n的最大公约数*/

main()

{int m,n,temp,answer;

printf("please input two integer numbers:\n");

scanf("%d%d",&m,&n);

if(m

{temp=m;m=n;n=temp;}

while(n!=0)

{temp=m%n;