Compilare: user.cpp: In function ‘int main()’: user.cpp:11:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<strlen(sir);i++) ^ user.cpp:29:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<=strlen(sir);i++) ^ user.cpp:40:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k=j+1;k<=strlen(sir);k++) ^ user.cpp:54:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k=j+1;k<=strlen(sir);k++) ^ user.cpp:68:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k=j+1;k<=strlen(sir);k++) ^ user.cpp:82:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k=j+1;k<=strlen(sir);k++) ^ user.cpp:100:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k=i+1;k<=strlen(sir);k++) ^ user.cpp:114:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k=i+1;k<=strlen(sir);k++) ^ user.cpp:124:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<=strlen(sir);i++) ^ user.cpp:130:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k=i+1;k<=strlen(sir);k++) ^ user.cpp:144:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k=i+1;k<=strlen(sir);k++) ^ user.cpp:154:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<=strlen(sir);i++) ^