ern2018@tg says to 電訊台
#include<stdio.h> void main() { int value, digit; printf("Enter the number to be reversed.\n"); scanf("%d",&value); if( value == 0 ){ printf("You cannot enter zero!\n"); if( value <= 0 ){ printf("You only can enter positive!\n"); }} //printf("OK!\n"); digit = value % 10; printf("%d", digit); value = value / 10; if( value != 0 ){ digit = value % 10; printf("%d", digit); value = value / 10; if( value != 0 ){ digit = value % 10; printf("%d", digit); value = value / 10; if( value != 0 ){ digit = value % 10; printf("%d", digit); value = value / 10; }}} printf("\n\n\nThank you!\n\n\n"); }