grupe2.c: In function 'main': grupe2.c:10: error: 'for' loop initial declarations are only allowed in C99 mode grupe2.c:10: note: use option -std=c99 or -std=gnu99 to compile your code grupe2.c:11: error: 'for' loop initial declarations are only allowed in C99 mode grupe2.c:37: error: redefinition of 'i' grupe2.c:10: note: previous definition of 'i' was here grupe2.c:37: error: 'for' loop initial declarations are only allowed in C99 mode grupe2.c:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result grupe2.c:12: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result