View Compilation Error

0_0_30324997_12941.c: In function 'main':
0_0_30324997_12941.c:12:2: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
  for(int i=0; i<T; i++){
  ^
0_0_30324997_12941.c:12:2: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
0_0_30324997_12941.c:18:3: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
   for(int j=0; j<n; j++){
   ^
0_0_30324997_12941.c:25:11: error: redefinition of 'j'
   for(int j=0; j<n; j++){
           ^
0_0_30324997_12941.c:18:11: note: previous definition of 'j' was here
   for(int j=0; j<n; j++){
           ^
0_0_30324997_12941.c:25:3: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
   for(int j=0; j<n; j++){
   ^