#include <stdio.h>
 
int main() {
    int num;       
    int reversed;   
    int digit;      
 
    reversed = 0;   
 
 
    printf("数字を入力してください: ");
    scanf("%d", &num);
 
    do {
        digit = num % 10;                   
        reversed = reversed * 10 + digit;   
        num = num / 10;                     
    } while (num != 0);                    
 
    printf("反対にした数字: %d\n", reversed);
 
    return 0;
}

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