10-19 Exercise 3: Prints the number with its digits reversed

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Write a program that input four-digit number, then prints the number with its digits reversed .

寫一個輸入4位數字，反轉輸出這個數字的值

Example input: 

5455

Example output:

5545

Example input: 

5400

Example output:

45
[Exercise] Coding (C) - asked in Chapter 4: Expressions by (12.1k points)
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Hidden content!
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Hidden content!
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cc1: all warnings being treated as errors
commented by (4.3k points)
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commented by (4.3k points)
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Hidden content!
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answered by (-284 points)
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prog.c: In function 'main':
prog.c:4:19: error: variable 'h' set but not used [-Werror=unused-but-set-variable]
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                   ^
cc1: all warnings being treated as errors
commented by (4.3k points)
0 0
prog.c: In function 'main':
prog.c:4:19: error: variable 'h' set but not used [-Werror=unused-but-set-variable]
 int a,b,c,d,e,f,g,h,v,swap,temp,sum;
                   ^
cc1: all warnings being treated as errors
commented by (4.3k points)
0 0
-----------Re-judge-----------
Case 0: Correct output
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commented by (4.3k points)
0 0
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commented by (4.3k points)
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Hidden content!
#include <stdio.h>

int main()

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answered by (-301 points)
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