View Compilation Error

0_0_37192482_12867.c: In function 'main':
0_0_37192482_12867.c:7:10: error: redeclaration of 'i' with no linkage
  for(int i=1;i<199;i++){
          ^
0_0_37192482_12867.c:4:8: note: previous declaration of 'i' was here
  int n,i,a,b,c;
        ^
0_0_37192482_12867.c:7:2: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
  for(int i=1;i<199;i++){
  ^
0_0_37192482_12867.c:7:2: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code