Compilare: main.cpp: In function 'bool este_cifra(char*)': main.cpp:12:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<strlen(n); i++) ~^~~~~~~~~~ main.cpp: In function 'void compresie(int, int, int, int)': main.cpp:25:11: warning: variable 'a' set but not used [-Wunused-but-set-variable] int p,a[1001][1001]; ^ main.cpp: In function 'int main()': main.cpp:60:28: warning: unused variable 'l1' [-Wunused-variable] int i,nrstea=0,val,sum,l1,c1,l2,c2,a[1001][1001]; ^~ main.cpp:60:31: warning: unused variable 'c1' [-Wunused-variable] int i,nrstea=0,val,sum,l1,c1,l2,c2,a[1001][1001]; ^~ main.cpp:60:34: warning: unused variable 'l2' [-Wunused-variable] int i,nrstea=0,val,sum,l1,c1,l2,c2,a[1001][1001]; ^~ main.cpp:60:37: warning: unused variable 'c2' [-Wunused-variable] int i,nrstea=0,val,sum,l1,c1,l2,c2,a[1001][1001]; ^~ main.cpp: In function 'bool este_cifra(char*)': main.cpp:20:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ main.cpp: In function 'void compresie(int, int, int, int)': main.cpp:30:11: warning: 'p' may be used uninitialized in this function [-Wmaybe-uninitialized] if(n[p]=='*') ~~~^ main.cpp:30:11: warning: 'n[p]' may be used uninitialized in this function [-Wmaybe-uninitialized]