Compilare: main.cpp: In function 'int num()': main.cpp:79:37: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(sir, 1, DIM2, fin); ^ main.cpp:88:37: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(sir, 1, DIM2, fin); ^ main.cpp: In function 'int main()': main.cpp:94:29: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(sir, 1, DIM2, fin); ^