Compilare: user.cpp: In function ‘char nextch()’: user.cpp:10:36: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buf, BUF_SIZE, 1, fi); ^ user.cpp: In function ‘int main()’: user.cpp:51:9: warning: assuming signed overflow does not occur when assuming that (X - c) <= X is always true [-Wstrict-overflow] if(pos <= sA){ ^ user.cpp:51:9: warning: assuming signed overflow does not occur when assuming that (X - c) <= X is always true [-Wstrict-overflow] if(pos <= sA){ ^ user.cpp:73:9: warning: assuming signed overflow does not occur when assuming that (X - c) <= X is always true [-Wstrict-overflow] if(pos <= sA && !fA[pos]) A[pos] = 9; ^ user.cpp:73:9: warning: assuming signed overflow does not occur when assuming that (X - c) <= X is always true [-Wstrict-overflow] if(pos <= sA && !fA[pos]) A[pos] = 9; ^ user.cpp:51:9: warning: assuming signed overflow does not occur when assuming that (X - c) <= X is always true [-Wstrict-overflow] if(pos <= sA){ ^ user.cpp:73:9: warning: assuming signed overflow does not occur when assuming that (X - c) <= X is always true [-Wstrict-overflow] if(pos <= sA && !fA[pos]) A[pos] = 9; ^