Compilare: main.cpp: In function 'int main()': main.cpp:36:119: warning: suggest parentheses around '&&' within '||' [-Wparentheses] if((a[i][j]==a[i][k]+a[k][j] && b[i][j]<b[i][k]+b[k][j])||(a[i][j]>a[i][k]+a[k][j] || a[i][j]==0) && i!=j) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~ main.cpp:23:22: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&n); ^ main.cpp:27:36: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&a[i][j]); ^