Compilare: main.cpp: In function 'void rez()': main.cpp:20:51: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d%d%d%d%d",&n,&m,&x1,&y1,&x2,&y2); ^ main.cpp:23:32: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&a[i][j]); ^