Borderou de evaluare (job #793512)

Compilare: main.cpp: In function 'int main()': main.cpp:11:13: warning: unused variable 'a' [-Wunused-variable] 11 | int a,S=0,nr=0; | ^ main.cpp:18:51: warning: 'prev' may be used uninitialized [-Wmaybe-uninitialized] 18 | if(s=='+' || (s==' ' && prev >='0' && prev <='9')) | ~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~ main.cpp:12:16: note: 'prev' was declared here 12 | char s,prev; | ^~~~