string.cpp: In function 'int main()': string.cpp:26: warning: name lookup of 'i' changed string.cpp:13: warning: matches this 'i' under ISO standard rules string.cpp:23: warning: matches this 'i' under old rules string.cpp:18: warning: 'sol' may be used uninitialized in this function string.cpp:18: warning: 'nr' may be used uninitialized in this function