reverse digits of an integer
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/*Reverse digits of an integer.Example1: x = 123, return 321Example2: x = -123, return -321click to show spoilers.Note:The input is assumed to be a 32-bit signed integer. Your function should return 0 when the reversed integer overflows.*/#include <stdio.h>#include <math.h>#define INT_MAX 2147483647#define INT_MIN -2147483647int reverse(int x){long res=0;while(x){res=res*10+x%10;x/=10;}return (res>INT_MAX || res<INT_MIN) ? 0 : res;}int main(int argc,char **argv){int test=2147483647;printf("test:%d test_reverse:%d\n",test,reverse(test));return 0;}
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