4-4

運行結果1

結果2

#include<stdio.h> int main(void) {int i,m;printf("Enter a number:");scanf("%d",&m);for(i=2;i<=m/2;i++)if(m%i==0)break;if(i>m/2&&m!=1)printf("%d is a prime number!\n",m);elseprintf("No!\n");return 0; }

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4-5

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#include<stdio.h> int main(void) {int mynumber=38;int count=0,yournumber;for(count=1;count<=5;count++){printf("Input your number:");scanf("%d",&yournumber);if(yournumber==mynumber){printf("Ok!you are right!\n");break;}elseif(yournumber>mynumber)printf("Sorry!your number is bigger than my number!\n");elseprintf("Sorry!your number is smaller than my number!\n");}printf("Game is over!\n");return 0; }

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4-6

#include<stdio.h> double fact(int n); int main(void) {int i;double sum;sum=0;for(i=1;i<=100;i++)sum=sum+fact(i);printf("1!+2!+...+100!=%e\n",sum);return 0; } double fact(int n) {int i;double result;result=1;for(i=1;i<=n;i++)result=result*i;return result; }

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轉載于:https://www.cnblogs.com/baojunchi/p/3350487.html

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