View Compilation Error

0_0_21964972_30540.c: In function 'main':
0_0_21964972_30540.c:17:9: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
         for (int i=0; i < count; i++) {
         ^
0_0_21964972_30540.c:17:9: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
0_0_21964972_30540.c:20:18: error: redefinition of 'i'
         for (int i=0; i<year; i++) {
                  ^
0_0_21964972_30540.c:17:18: note: previous definition of 'i' was here
         for (int i=0; i < count; i++) {
                  ^
0_0_21964972_30540.c:20:9: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
         for (int i=0; i<year; i++) {
         ^
0_0_21964972_30540.c:22:13: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
             for (int j=0; j<count; j++) {
             ^
0_0_21964972_30540.c:23:17: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
                 for (int k=w[j]; k<=V; k++) {
                 ^