How could I read a value of 3 digits and print them on the screen inversely in C?

If I stored the value '123' in a variable of the integer type, How could I print the contents of the variable on the screen inversely?

For example, for value '123 'the expected output would be' 321'; for' 472 'it would be'274'.

 1
cinteiros
Author: Jefferson Quesado, 2017-10-14
Source

3 answers

You can use an integer-based solution by applying division and division rest: 

int x = 123;

while (x > 0){ //enquanto tem digitos
    printf("%d", x % 10); //mostra o ultimo digito com resto da divisão por 10
    x = x /10; //corta o ultimo digito
}

See the example in Ideone

 3
Author: Isac, 2017-10-14 15:30:20

Use sprintf function: 

#include <stdio.h>

int main() {
    int someInt = 368;
    char str[3];
    sprintf(str, "%d", someInt);
    printf("%c%c%c", str[2], str[1], str[0]);
    return 0;
}
 1
Author: Rafael Coelho, 2017-10-14 15:28:34

To invert the integer, simply use the remainder and division of the integer, thus: 

#include <stdio.h>
#include <stdlib.h>

int main(){

    int numero, numIvertido;

    printf("Digite um numero inteiro: ");
    scanf("%d",&numero);

    if(numero >= 0){
        do{
            numIvertido = numero % 10;
            printf("%d", numIvertido);
            numero /= 10;
        }while(numero != 0);
        printf("\n");
    }
    return 0;
}

Output: 

Digite um numero inteiro: 1234567
7654321
 1
Author: William Henrique, 2017-10-14 15:37:42