Compilare: user.c: In function ‘uneste’: user.c:31:3: warning: suggest parentheses around assignment used as truth value [-Wparentheses] if ( rang[rx] = rang[ry] ) ^~ user.c: In function ‘main’: user.c:62:22: warning: unused variable ‘c’ [-Wunused-variable] int n, m, i, x, y, c; ^ user.c:62:19: warning: unused variable ‘y’ [-Wunused-variable] int n, m, i, x, y, c; ^ user.c:62:16: warning: unused variable ‘x’ [-Wunused-variable] int n, m, i, x, y, c; ^ user.c:63:3: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d%d", &n, &m ); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ user.c:65:5: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d%d%d", &E[i].x, &E[i].y, &E[i].c ); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~