View Compilation Error

0_0_19656832_9499.c: In function 'main':
0_0_19656832_9499.c:31:3: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
   for (int i = 0; i < 4; i++) {
   ^
0_0_19656832_9499.c:31:3: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
0_0_19656832_9499.c:43:4: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
    for (int temp = first + 1; temp <= last; temp++) {
    ^