Compilare: user.cpp: In function ‘int main()’: user.cpp:14:25: warning: suggest parentheses around assignment used as truth value [-Wparentheses] while(p=strchr(a,')')) ^ user.cpp:28:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<strlen(a);i++) ^ user.cpp:32:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<strlen(a);i++) ^ user.cpp:36:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<strlen(a);i++) ^ user.cpp:38:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<strlen(a) && !(isdigit(a[i]))) ^ user.cpp:47:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<strlen(a);i++) ^ user.cpp:49:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<strlen(a) && !(isalpha(a[i]))) ^ user.cpp:57:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<strlen(s);i++) ^ user.cpp:63:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<strlen(v);i++) ^ user.cpp:10:37: warning: unused variable ‘cuv’ [-Wunused-variable] char a[100] , s[100] , v[100] , cuv[20]; ^ user.cpp:11:16: warning: unused variable ‘P’ [-Wunused-variable] char *p , *P; ^