0_0_18540383_19039.c: In function 'main':
0_0_18540383_19039.c:12:9: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
for(int i = k + 1; i < k + k; i++) printf(" %d",i);
^
0_0_18540383_19039.c:12:9: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
0_0_18540383_19039.c:13:17: error: redefinition of 'i'
for(int i = 1; i <= k; i++) printf(" %d",i);
^
0_0_18540383_19039.c:12:17: note: previous definition of 'i' was here
for(int i = k + 1; i < k + k; i++) printf(" %d",i);
^
0_0_18540383_19039.c:13:9: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
for(int i = 1; i <= k; i++) printf(" %d",i);
^
0_0_18540383_19039.c:14:17: error: redefinition of 'i'
for(int i = k + k; i <= n; i++) printf(" %d",i);
^
0_0_18540383_19039.c:13:17: note: previous definition of 'i' was here
for(int i = 1; i <= k; i++) printf(" %d",i);
^
0_0_18540383_19039.c:14:9: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
for(int i = k + k; i <= n; i++) printf(" %d",i);
^
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