hdoj-1266-Reverse Number
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Description
Welcome to 2006'4 computer college programming contest!
Specially, I give my best regards to all freshmen! You are the future of HDU ACM! And now, I must tell you that ACM problems are always not so easy, but, except this one... Ha-Ha!
Give you an integer; your task is to output its reverse number. Here, reverse number is defined as follows:
1. The reverse number of a positive integer ending without 0 is general reverse, for example, reverse (12) = 21;
2. The reverse number of a negative integer is negative, for example, reverse (-12) = -21;
3. The reverse number of an integer ending with 0 is described as example, reverse (1200) = 2100.
Specially, I give my best regards to all freshmen! You are the future of HDU ACM! And now, I must tell you that ACM problems are always not so easy, but, except this one... Ha-Ha!
Give you an integer; your task is to output its reverse number. Here, reverse number is defined as follows:
1. The reverse number of a positive integer ending without 0 is general reverse, for example, reverse (12) = 21;
2. The reverse number of a negative integer is negative, for example, reverse (-12) = -21;
3. The reverse number of an integer ending with 0 is described as example, reverse (1200) = 2100.
Input
Input file contains multiple test cases. There is a positive integer n (n<100) in the first line, which means the number of test cases, and then n 32-bit integers follow.
Output
For each test case, you should output its reverse number, one case per line.
Sample Input
312-121200
Sample Output
21-212100
给你一个数,把它倒过来就好了。但是不能有前导零。
字符串去做啊,记录下有几个零和零的位置然后反着输出来就好了
#include<stdio.h>#include<string.h>int main(){char a[10000]; int t, n, i, x,k; scanf("%d", &t); while( t-- ) { scanf("%s", &a); x = strlen(a); for(k = x - 1; k >= 0; k--) { if(a[k] != '0') break; } if(a[0] == '-') { printf("-"); for(i = k; i >= 1; i--) printf("%c", a[i]); for(i = k + 1; i < x; i++) printf("0"); printf("\n"); } else { for(i = k; i >= 0; i--) printf("%c", a[i]); for(i = k + 1; i < x; i++) printf("0"); printf("\n"); } } return 0;}
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