Segmentation fault (core dumped)?

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程序代码

#include"stdio.h"

void main()
{
    int a[5];
    int *p;
    int i;
    
    for(i<0;i<5;i++);
    {
        a[i]=i+1;
        p=a;
    }
    
    /*下标法输出数组元素*/
    
    for(i=0;i<5;i++)
    {
        printf("a[%d]:%-8d",i,a[i]);
        printf("\n");
    }
    
    /*地址法输出数组元素*/
    
    for(i=0;i<5;i++)
    {
        printf("*(a+%d):%-8d",i,*(a+i));
        printf("\n");
    }
    
    /*下标法输出数组元素*/
    
    for(i=0;i<5;i++)
    {
        printf("p[%d]:%-8d",i,p[i]);
        printf("\n");
    }
    
    /*地址法输出数组元素*/
    
    for(i=0;i<5;i++)
    {
        printf("*(p+%d):%-8d",i,*(p+i));
        printf("\n");
    }
}  

运行结果

root@huangzihan:/program/c_program# ./output_array_elements.out
Segmentation fault (core dumped)

Gdb调试

root@huangzihan:/program/c_program# gcc output_array_elements.c -g -o output_array_elements.out
root@huangzihan:/program/c_program# ls -a
.  ..  core  input_average.c  input_average.out  output_array_elements.c  output_array_elements.out
root@huangzihan:/program/c_program# gdb ./output_array_elements.out core
GNU gdb (Ubuntu 9.2-0ubuntu1~20.04) 9.2
Copyright (C) 2020 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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There is NO WARRANTY, to the extent permitted by law.
Type "show copying" and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
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Reading symbols from ./output_array_elements.out...

warning: core file may not match specified executable file.
[New LWP 85018]
Core was generated by `./output_array_elements.out'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x000055e9c1e4a1bb in main () at output_array_elements.c:11
11                      a[i]=i+1;
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1 个回答

第9行“i<0”写错了

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