Compilare: main.c: In function 'combinari': main.c:23:9: warning: implicit declaration of function 'calcul' [-Wimplicit-function-declaration] calcul(); ^~~~~~ main.c: At top level: main.c:36:6: warning: conflicting types for 'calcul' void calcul() { ^~~~~~ main.c:23:9: note: previous implicit declaration of 'calcul' was here calcul(); ^~~~~~ main.c: In function 'main': main.c:52:5: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d", &n, &m); ^~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:54:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d%d", &x, &y, &k); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~