week6 练习

/* Note:Your choice is C IDE */#include "stdio.h"main(){   int i=2;int sum=0;do{   sum+=i;i+=2;}while(i<=100);printf("%d",sum);    }/* Note:Your choice is C IDE */#include "stdio.h"main(){   int i=2;int sum=0;while(i<=100){sum+=i;i+=2;}printf("%d",sum);    }/* Note:Your choice is C IDE */#include "stdio.h"main(){   int i;int sum=0;for(i=2;i<=100;i=i+2)sum+=i;printf("%d",sum);    }/* Note:Your choice is C IDE */#include "stdio.h"//not?valid?month?numbermain(){     int i;printf("input a number:");scanf("%d",&i);switch(i){   case(1):printf("January");break;case(2):printf("Febuary");break;case(3):printf("March");break;case(4):printf("April");break;case(5):printf("May");break;case(6):printf("June");break;case(7):printf("July");break;case(8):printf("Augest");break;case(9):printf("September");break;case(10):printf("October");break;case(11):printf("Novomber");break;case(12):printf("Decsember");break;default:printf("not valid month number");}    }/* Note:Your choice is C IDE */#include "stdio.h"main(){   int i;printf("please input a number:  ");scanf("%d",&i);if (i>1000)printf("big");if(i<100)printf("small");else printf("middle");    }/* Note:Your choice is C IDE */#include "stdio.h"main(){    int i;printf("input a number:");scanf("%d",&i);if(i>-1&&i<10)printf("OK");else printf("not ok");    }/* Note:Your choice is C IDE */#include "stdio.h"main(){   float i;printf("please input a number: ");scanf("%f",&i);printf("%8.4f\n",i);printf("%09.3f\n",i);    }/* Note:Your choice is C IDE */#include "stdio.h"void main(){   int i;printf("please input a number : ");scanf("%d",&i);printf("%d\n",i);printf("%o\n",i);printf("%x\n",i);    }