View Compilation Error

0_0_35358962_27348.c: In function 'Find':
0_0_35358962_27348.c:9:4: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
    for(int i = 1; i <= n; i++)
    ^
0_0_35358962_27348.c:9:4: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
0_0_35358962_27348.c: In function 'slove':
0_0_35358962_27348.c:25:4: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
    for(int i = 1; i <= n; i++)
    ^
0_0_35358962_27348.c:32:12: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
            for(int j = r+1; j <= n; j++)
            ^
0_0_35358962_27348.c: In function 'main':
0_0_35358962_27348.c:58:7: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
       for(int i = 1; i <= n; i++)
       ^