Compilare: main.c: In function 'KMPSearch': main.c:7:13: warning: implicit declaration of function 'strlen' [-Wimplicit-function-declaration] int M = strlen(pat); ^~~~~~ main.c:7:13: warning: incompatible implicit declaration of built-in function 'strlen' main.c:7:13: note: include '<string.h>' or provide a declaration of 'strlen' main.c:10:5: warning: implicit declaration of function 'computeLPSArray' [-Wimplicit-function-declaration] computeLPSArray(pat, M, lps); ^~~~~~~~~~~~~~~ main.c: At top level: main.c:44:6: warning: conflicting types for 'computeLPSArray' void computeLPSArray(char* pat, int M, int* lps) ^~~~~~~~~~~~~~~ main.c:10:5: note: previous implicit declaration of 'computeLPSArray' was here computeLPSArray(pat, M, lps); ^~~~~~~~~~~~~~~ main.c: In function 'main': main.c:78:16: warning: format '%s' expects argument of type 'char *', but argument 3 has type 'char (*)[255]' [-Wformat=] fscanf(f,"%s",&sir1); ^ main.c:80:16: warning: format '%s' expects argument of type 'char *', but argument 3 has type 'char (*)[255]' [-Wformat=] fscanf(f,"%s",&sir2); ^ main.c:78:5: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%s",&sir1); ^~~~~~~~~~~~~~~~~~~~ main.c:80:5: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%s",&sir2); ^~~~~~~~~~~~~~~~~~~~