Compilare: main.cpp: In function 'int pol()': main.cpp:44:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0;i < strlen(s);i++){ ~~^~~~~~~~~~~ main.cpp:42:10: warning: unused variable 'k' [-Wunused-variable] int i, k, a, sum; ^ main.cpp:42:13: warning: unused variable 'a' [-Wunused-variable] int i, k, a, sum; ^ main.cpp: In function 'int main()': main.cpp:122:9: warning: unused variable 'i' [-Wunused-variable] int i; ^ main.cpp: In function 'int calc(int, int, char)': main.cpp:39:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ main.cpp: In function 'int main()': main.cpp:120:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("evaluare.in", "r", stdin); ^ main.cpp:121:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("evaluare.out", "w", stdout); ^ main.cpp:123:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%s", s); ^