Compilare: user.c: In function ‘main’: user.c:13:7: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d %d",&nn,&m); ^ user.c:14:24: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] for(i=0;i<nn;i++)fscanf(fi,"%d",&a[i]); ^ user.c:21:25: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] for(j=0;j<m;j++) {fscanf(fi,"%d %d",&i1,&i2); ^