使用C語言的除法和取模運算子將數字按照相反的順序列印出來

Problem

How to print the given two-digit number in reverse order with the help of division and Modulo operator using C programming language?

#Solution

So far, we had seen how to reverse the string using string function and without string function. Now let's see how to reverse the two-digit number without using the predefined function.

##The logic we use to reverse the number with the help of operators is −

int firstno=number%10; //stores remainder
int secondno=number/10;// stores quotient

然後印出第一個數字，後面跟著第二個數字，然後你就會得到給定數字的逆序數字。

程式1

在這個例子中，我們將取一個兩位數，並應用除法和取模運算子來逆轉數字−

#include<stdio.h>
int main(){
   int number;
   printf("enter a number:");
   scanf("%4d",&number);
   int firstno=number%10; //stores remainder
   int secondno=number/10;// stores quotient
   printf("After reversing =%d%d</p><p>",firstno,secondno);
   return 0;
}

Output

enter a number:45
After reversing =54

程式2

在這個範例中，我們將取一個3位數，並且套用除法和取模運算子來反轉這個數−

 線上示範

#include<stdio.h>
int main(){
   int number,num1,num2,num3,result;
   printf("enter a number:");
   scanf("%4d",&number);
   num1 = number / 100;
   num2 = (number % 100) / 10;
   num3 = number%10 ;
   result = 100*num3 + 10*num2 + num1;
   printf("After reversing =%d</p><p>",result);
   return 0;
}

Output

enter a number:479
After reversing =974

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