从键盘输入某学生的考试成绩,要求输出成绩等级A,B,C,D,E 学生的成绩可分成5个等级,90~100分为A 80~89分为B,70~79分为C,60~69分为D,0~59分为E 要求在输入负数时,给出错误提示
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ãã
#include <stdio.h>ããint main(){
ããint a,b,max;
ããprintf("\n input two numbers: ");
ããscanf("%d%d",&a,&b);
ããmax=a;
ããif (max<b) max=b;
ããprintf("max=%d\n",max);
ããreturn 0;
ãã}
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ããè¯å¥1;
ããelse
ããè¯å¥2;
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ãã示ä¾å¦ä¸:
ãã#include <stdio.h>ããint main(){
ããint a, b;
ããprintf("input two numbers: ");
ããscanf("%d%d",&a,&b);
ããif(a>b)
ããprintf("max=%d\n",a);
ããelse
ããprintf("max=%d\n",b);
ããreturn 0;
ãã}
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ããif(表达å¼1)
ããè¯å¥1;
ããelse if(表达å¼2)
ããè¯å¥2;
ããelse if(表达å¼3)
ããè¯å¥3;
ããâ¦
ããelse if(表达å¼m)
ããè¯å¥m;
ããelse
ããè¯å¥n;
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ã
ã#include <stdio.h>ããint main(){
ããchar c;
ããprintf("input a character: ");
ããc=getchar();
ããif(c<32)
ããprintf("This is a control character\n");
ããelse if(c>='0'&&c<='9')
ããprintf("This is a digit\n");
ããelse if(c>='A'&&c<='Z')
ããprintf("This is a capital letter\n");
ããelse if(c>='a'&&c<='z')
ããprintf("This is a small letter\n");
ããelse
ããprintf("This is an other character\n");
ããreturn 0;
ãã}
ãã
char c='m';
do{
while(c!=‘Y’&&c!=‘N’){
printf(“是否输入成绩?(Y or N)");
scanf("%c";&c);
}
if(c==‘N’) break;
printf(“请输入成绩:score=");
scanf(%d,&score);
printf("\n");
if(90=<score<=100){
//处理语句
}else if(80=<score<90){
//处理语句
}
else if(70=<score<80){
//处理语句
}
else if(60=<score<70){
//处理语句
}
else if(0=<score<60){
//处理语句
}
else if(100<score){
//处理语句
}
else printf("该数为负数重新输入!");
}while(1);本回答被提问者和网友采纳
while(scanf("%d",&a)!=eof&&(a<100||a>999))
printf("您输入的不是三位数,请重新输入:");
有疑问提出。
望采纳。
default:break;