Compilare: user.cpp: In function ‘void citire()’: user.cpp:15:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(k=1; k<=m; k++) ~^~~ user.cpp: In function ‘void parcurgere()’: user.cpp:25:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1; i<=n; i++) ~^~~ user.cpp:27:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(k=1; k<=n; k++) ~^~~ user.cpp:28:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1; i<=n; i++) ~^~~ user.cpp:29:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=1; j<=n; j++) ~^~~ user.cpp: In function ‘void componente()’: user.cpp:39:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1; i<=n; i++) ~^~~ user.cpp:42:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=1; j<=n; j++) ~^~~ user.cpp: In function ‘int main()’: user.cpp:55:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1; i<=n; i++) ~^~~ user.cpp:56:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] {for(j=0; j<x[i].size(); j++) ~^~~~~~~~~~~~