i;
printf(" 请输入一串字符: ");scanf("%c",&num[i]);
if(getchar()=='\n')
break;
}if(num1[i]>='a'&&num1[i]<='z')
{
b++;
}
}scanf("%d",&num1[i]);
printf("请输入num2的值: \n");scanf("%d",&num2[i]);
for(i=0,k=0;i<5,k<5;i++,k++)ptr1=&num1[i];
ptr2=&num2[i];
num3[k]=*ptr1+*ptr2;
}\n");
for(i=0;i<5;i++)printf("%5d",num3[i]);
printf("\n");scanf("%d",&num[i]);
printf("该数组为: ");printf("%5d",num[i]);
printf("\n");ptr1=&num[i];
ptr2=&num[k];
temp=*ptr2;
num[k]=*ptr1;
num[i]=temp;
}printf("%5d",num[i]);
printf("\n");printf("%d\t\n",a);
if((b>a)&&(b>c))printf("\t%d\t\n",b);
if((c>a)&&(c>b))printf("\t\t%d\n\t",c);
}printf("\n你输入的是大写字母\n");
elseprintf("\n你输入的不是大写字母\n");
}float a,b;
printf("请输入第一个数: ");
scanf("%f",&a);//从键盘输入两个实数赋给变量
printf("请输入第二个数: ");
scanf("%f",&b);//从键盘输入两个实数赋给变量
a*b;
a+b;
a/b;
a-b;
printf("积= %5.2f\n",a*b);
printf("和= %5.2f\n",a+b);
printf("商= %5.2f\n",a/b);
printf("差= %5.2f\n",a-b);
}