Compilare: user.c: In function ‘myError’: user.c:21: warning: implicit declaration of function ‘exit’ user.c:21: warning: incompatible implicit declaration of built-in function ‘exit’ user.c: In function ‘citire’: user.c:40: warning: implicit declaration of function ‘calloc’ user.c:40: warning: incompatible implicit declaration of built-in function ‘calloc’ user.c:37: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result user.c:38: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result user.c:39: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result user.c:48: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result user.c:49: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result user.c: In function ‘gutui_gmax’: user.c:131: warning: incompatible implicit declaration of built-in function ‘calloc’ user.c:197: warning: implicit declaration of function ‘free’ user.c:197: warning: incompatible implicit declaration of built-in function ‘free’ user.c:125: warning: unused variable ‘pornire_prec’ user.c:125: warning: unused variable ‘k’ user.c: In function ‘main’: user.c:214: warning: incompatible implicit declaration of built-in function ‘free’ user.c:206: warning: unused variable ‘i’ user.c: In function ‘scriere’: user.c:70: warning: control reaches end of non-void function