黑马程序员-if 语句练习

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/*1>	输入一个整数day代表星期几，根据day的值输出对应的星期几，比如day==1，就输出“星期一”*/#include <stdio.h>int main(){// 1.输入一个整数printf("请输入一个整数：\n");//2.接收输入的整数int day;scanf("%d",&day);//3.判断输出星期几if (day % 7 == 1){printf("星期一\n");}if (day % 7 == 2){printf("星期二\n");}if (day % 7 == 3){printf("星期三\n");}if (day % 7 == 4){printf("星期四\n");}if (day % 7 == 5){printf("星期五\n");}if (day % 7 == 6){printf("星期六\n");}if (day % 7 == 0){printf("星期日\n");}return 0;}

#include <stdio.h>int main(){//1提示输入printf("请输入分数：\n");//2接收输入int score;scanf("%d",&score);//3判断等级switch (score/10) {case 10:case 9:printf("A\n");break;case 8:printf("B\n");break;case 7:printf("C\n");break;case 6:printf("D\n");break;default:printf("E\n");break;}/*if (score>=90 && score<=100){printf("A\n");}else if (score>=80){printf("B\n");}else if (score>=709){printf("C\n");}else if (score>=60){printf("D\n");}else if (score<=59){printf("E\n");}*//*if (score>=90 && score<=100){printf("A\n");}else if (score>=80 && score<=89){printf("B\n");}else if (score>=70 && score<=79){printf("C\n");}else if (score>=60 && score<=69){printf("D\n");}else if (score<=59){printf("E\n");}*//*if (score>=90 && score<=100){printf("A\n");}if (score>=80 && score<=89){printf("B\n");}if (score>=70 && score<=79){printf("C\n");}if (score>=60 && score<=69){printf("D\n");}if (score<=59){printf("E\n");}*/return 0;}

/*2> 输入一个整数month代表月份，根据月份输出对应的季节。春季：3、4、5夏季：6、7、8秋季：9、10、11冬季：12、1、2*/#include <stdio.h>int main(){printf("请输入一个整数：\n");int month;scanf("%d", &month);if(month==3||month==4||month==5){printf("春季\n");}if(month==6||month==7||month==8){printf("夏季\n");}if(month==9||month==10||month==11){printf("秋季\n");}if(month==1||month==2||month==12){printf("冬季\n");}return 0;}