nrpal.cpp: In function 'int comb(int, int)': nrpal.cpp:22: warning: unused variable 'j' nrpal.cpp: In function 'int main()': nrpal.cpp:41: warning: format '%s' expects type 'char*', but argument 2 has type 'char (*)[101]' nrpal.cpp:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result nrpal.cpp:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result nrpal.cpp:41: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result