matrice.cpp: In function 'void read(int&)': matrice.cpp:99: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result matrice.cpp:107: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result matrice.cpp: In function 'int main()': matrice.cpp:122: warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x matrice.cpp:122: warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x matrice.cpp:129: warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x matrice.cpp:129: warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x matrice.cpp:115: warning: unused variable 'm' matrice.cpp:115: warning: unused variable 'a' matrice.cpp:115: warning: unused variable 'b' matrice.cpp:115: warning: unused variable 'c' matrice.cpp:113: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result matrice.cpp:114: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result matrice.cpp:116: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result