View Compilation Error

0_0_36210735_193.c: In function 'dfs':
0_0_36210735_193.c:43:5: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
     for(int i=1; i<n; i++)
     ^
0_0_36210735_193.c:43:5: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
0_0_36210735_193.c:45:9: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
         for(int j=i+1; j<=n; j++)
         ^
0_0_36210735_193.c:48:27: error: expected expression before '/' token
             num[j]=num[n];//移到后面
                           ^
0_0_36210735_193.c:48:27: error: stray '\322' in program
0_0_36210735_193.c:48:27: error: stray '\306' in program
0_0_36210735_193.c:48:27: error: stray '\265' in program
0_0_36210735_193.c:48:27: error: stray '\275' in program
0_0_36210735_193.c:48:27: error: stray '\272' in program
0_0_36210735_193.c:48:27: error: stray '\363' in program
0_0_36210735_193.c:48:27: error: stray '\303' in program
0_0_36210735_193.c:48:27: error: stray '\346' in program
0_0_36210735_193.c: In function 'main':
0_0_36210735_193.c:97:9: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
         for(int i=2; i<=4; i++)
         ^