View Compilation Error

0_0_16241425_8517.c: In function 'chara':
0_0_16241425_8517.c:5:2: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
  for(int i=0;s[i]!=0;i++)
  ^
0_0_16241425_8517.c:5:2: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
0_0_16241425_8517.c: In function 'CHARA':
0_0_16241425_8517.c:13:2: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
  for(int i=0;s[i]!=0;i++)
  ^
0_0_16241425_8517.c: In function 'number':
0_0_16241425_8517.c:21:2: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
  for(int i=0;s[i]!=0;i++)
  ^
0_0_16241425_8517.c: In function 'other':
0_0_16241425_8517.c:29:2: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
  for(int i=0;s[i]!=0;i++)
  ^