View Compilation Error

0_0_26433321_15197.c: In function 'main':
0_0_26433321_15197.c:12:2: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
  for(int i = 0;i<=line1;i++)
  ^
0_0_26433321_15197.c:12:2: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
0_0_26433321_15197.c:51:10: error: redefinition of 'i'
  for(int i =1;i<=line2;i++)
          ^
0_0_26433321_15197.c:12:10: note: previous definition of 'i' was here
  for(int i = 0;i<=line1;i++)
          ^
0_0_26433321_15197.c:51:2: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
  for(int i =1;i<=line2;i++)
  ^
0_0_26433321_15197.c:82:41: error: lvalue required as left operand of assignment
   for((integer[num1line][0]>0) ? a=0 : a=1 ;integer[num1line][a] != ' ';a++)
                                         ^