Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:100:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%li", &i); ^ user.cpp:104:42: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%hi %li", &cmd, &arg); ^ /usr/lib/gcc/i686-linux-gnu/4.8/../../../i386-linux-gnu/libc.a(malloc.o): In function `free': (.text+0x4b00): multiple definition of `free' /tmp/cc6h3dhs.o:(.bss+0x0): first defined here /usr/bin/ld: Warning: size of symbol `free' changed from 12 in /tmp/cc6h3dhs.o to 140 in /usr/lib/gcc/i686-linux-gnu/4.8/../../../i386-linux-gnu/libc.a(malloc.o) /usr/bin/ld: Warning: type of symbol `free' changed from 1 to 2 in /usr/lib/gcc/i686-linux-gnu/4.8/../../../i386-linux-gnu/libc.a(malloc.o) collect2: error: ld returned 1 exit status