Compilare: user.c: In function ‘checkSizes’: user.c:83:9: warning: implicit declaration of function ‘addNode’ [-Wimplicit-function-declaration] addNode(x, y); ^ user.c:89:9: warning: implicit declaration of function ‘removeNodes’ [-Wimplicit-function-declaration] removeNodes(); ^ user.c: In function ‘computeRhombus’: user.c:99:10: warning: unused variable ‘tempBuffer’ [-Wunused-variable] char tempBuffer[256][256]; ^ user.c:98:15: warning: unused variable ‘k’ [-Wunused-variable] int i, j, k; ^ user.c:98:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j, k; ^ user.c:98:9: warning: unused variable ‘i’ [-Wunused-variable] int i, j, k; ^ user.c: At top level: user.c:104:6: warning: conflicting types for ‘addNode’ [enabled by default] void addNode(int x, int y) ^ user.c:83:9: note: previous implicit declaration of ‘addNode’ was here addNode(x, y); ^ user.c: In function ‘addNode’: user.c:109:9: warning: implicit declaration of function ‘malloc’ [-Wimplicit-function-declaration] node = malloc(sizeof(nod)); ^ user.c:109:16: warning: incompatible implicit declaration of built-in function ‘malloc’ [enabled by default] node = malloc(sizeof(nod)); ^ user.c:119:16: warning: incompatible implicit declaration of built-in function ‘malloc’ [enabled by default] node = malloc(sizeof(nod)); ^ user.c: At top level: user.c:130:6: warning: conflicting types for ‘removeNodes’ [enabled by default] void removeNodes() ^ user.c:89:9: note: previous implicit declaration of ‘removeNodes’ was here removeNodes(); ^ user.c: In function ‘removeNodes’: user.c:137:9: warning: implicit declaration of function ‘free’ [-Wimplicit-function-declaration] free(ultNod); ^ user.c:137:9: warning: incompatible implicit declaration of built-in function ‘free’ [enabled by default] user.c: In function ‘main’: