0_0_23940535_23346.c: In function 'main':
0_0_23940535_23346.c:12:5: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
for(int i = 0; i < m; i++){
^
0_0_23940535_23346.c:12:5: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
0_0_23940535_23346.c:19:5: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
for(int j = 1; j <= n; j++){
^
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