Compilare: main.c: In function 'ec2': main.c:41:7: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses] if( x != 0 && del >= 0 && sqrt( del ) == ( pp = ( int )sqrt( del ) ) ) ^ main.c: In function 'ec1': main.c:18:5: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d=%d", &y, &z ); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c: In function 'ec2': main.c:30:5: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "2+%dx+%d=%d", &y, &z, &q ); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c: In function 'main': main.c:63:5: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d%d", &n, &k ); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:65:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &xx ); ^~~~~~~~~~~~~~~~~~~~~~~~ main.c:70:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%dx%c", &x, &ch ); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~