View Compilation Error

0_0_17088852_5507.c: In function 'main':
0_0_17088852_5507.c:6:25: error: invalid operands to binary & (have 'char *' and 'int')
     while(scanf("%d%d%d"&a,&b,&n)==3)
                         ^
0_0_17088852_5507.c:10:9: error: expected ';' before 'int'
         int arr[48];
         ^
0_0_17088852_5507.c:11:9: error: 'arr' undeclared (first use in this function)
         arr[1]=1;
         ^
0_0_17088852_5507.c:11:9: note: each undeclared identifier is reported only once for each function it appears in
0_0_17088852_5507.c:13:9: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
         for(int i=3;i<48;i++)
         ^
0_0_17088852_5507.c:13:9: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code