Compilare: main.cpp: In function 'long long int eval_exp(char*, int)': main.cpp:60:37: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings] if(ptr = urm_elem(&a[0], "+-", n)) ^ main.cpp:60:38: warning: suggest parentheses around assignment used as truth value [-Wparentheses] if(ptr = urm_elem(&a[0], "+-", n)) ^ main.cpp:68:37: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings] if(ptr = urm_elem(&a[0], "*/", n)) ^ main.cpp:68:38: warning: suggest parentheses around assignment used as truth value [-Wparentheses] if(ptr = urm_elem(&a[0], "*/", n)) ^ main.cpp:76:36: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings] if(ptr = urm_elem(&a[0], "^", n)) ^ main.cpp:76:37: warning: suggest parentheses around assignment used as truth value [-Wparentheses] if(ptr = urm_elem(&a[0], "^", n)) ^ main.cpp:99:1: warning: control reaches end of non-void function [-Wreturn-type] } ^