suma4.cpp: In function 'int main()': suma4.cpp:31: warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x suma4.cpp:31: warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x suma4.cpp:55: warning: comparison between signed and unsigned integer expressions suma4.cpp:24: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result suma4.cpp:29: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result