给定一个整数，请将该数各个位上数字反转得到一个新数。新数也应满足整数的常见形式，即除非给定的原数为零，否则反转后得到的新数的最高位数字不应为零
例：
输入：1234
输出：4321
输入：-12300
输出：-321
#include <stdio.h> #include <string.h> void reverse_str(char *str) { int i; int str_len = strlen(str); int count = str_len / 2; for (i = 0; i < count; i++) { if (str[0] == '-') { char temp = str[i + 1]; str[i + 1] = str[str_len - i - 1]; str[str_len - i - 1] = temp; } else { char temp = str[i]; str[i] = str[str_len - i - 1]; str[str_len - i - 1] = temp; } } int start_index = 0; if (str[0] == '-') { start_index = 1; while ((str[start_index] == '0') && (str[start_index] != '\0')) { start_index++; } } else { while ((str[start_index] == '0') && (str[start_index] != '\0')) { start_index++; } } if (str[0] == '-') { if (str[start_index] != 0) { printf("-%s\n", &str[start_index]); } } else { if (str[start_index] != 0) { printf("%s\n", &str[start_index]); } } } int main(int argc, char **argv) { char str[100]; scanf("%s", str); reverse_str(str); return 0; }
