View Compilation Error

0_0_29366009_18480.c: In function 'int_i':
0_0_29366009_18480.c:7:2: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
  for(int i=0;i<n;i++)
  ^
0_0_29366009_18480.c:7:2: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
0_0_29366009_18480.c:10:12: error: expected expression before '/' token
   tru[i]=i;//?????????? 
            ^
0_0_29366009_18480.c: In function 'main':
0_0_29366009_18480.c:46:3: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
   for(int i=1;i<=m;i++)
   ^
0_0_29366009_18480.c:72:11: error: redefinition of 'i'
   for(int i=0;i<n2;i++)
           ^
0_0_29366009_18480.c:46:11: note: previous definition of 'i' was here
   for(int i=1;i<=m;i++)
           ^
0_0_29366009_18480.c:72:3: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
   for(int i=0;i<n2;i++)
   ^