Compilare: user.cpp: In function ‘int vecingred()’: user.cpp:31:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<strlen(a); i++) ^ user.cpp:64:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<strlen(ingred[i].un); j++) ^ user.cpp:33:13: warning: unused variable ‘init’ [-Wunused-variable] int init=i; ^ user.cpp: In function ‘int minute()’: user.cpp:90:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<strlen(a); i++) ^ user.cpp: In function ‘int main()’: user.cpp:117:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<strlen(ingred[i].un); j++) ^