Compilare: user.cpp: In function ‘void rf(int)’: user.cpp:14:50: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if((a[i][j]==a[i][k]+a[k][j] && b[i][k]+b[k][j]>b[i][j] || a[i][j]>a[i][k]+a[k][j] || !a[i][j] )&& i!=j) ~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~ user.cpp: In function ‘int main()’: user.cpp:41:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&n); ^ user.cpp:45:40: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&a[i][j]); ^