0_0_19666190_20371.c: In function 'main':
0_0_19666190_20371.c:6:3: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
for(int i=a;i<=b;i++){
^
0_0_19666190_20371.c:6:3: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
0_0_19666190_20371.c:9:11: error: redefinition of 'i'
for(int i=a;i<=b;i++){
^
0_0_19666190_20371.c:6:11: note: previous definition of 'i' was here
for(int i=a;i<=b;i++){
^
0_0_19666190_20371.c:9:3: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
for(int i=a;i<=b;i++){
^
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