View Compilation Error

0_0_14980943_14059.c: In function 'main':
0_0_14980943_14059.c:20:9: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
         for(int i=s1;i<=s2;i++)
         ^
0_0_14980943_14059.c:20:9: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
0_0_14980943_14059.c:24:13: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
             for(int j=32;j>=0;j--)
             ^
0_0_14980943_14059.c:39:19: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
                   for(int kk=k+1;kk<=32;kk++)
                   ^
0_0_14980943_14059.c:55:17: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
                 for(int k=0;k<=32&&s>0;k++){
                 ^