Compilare: user.cpp: In function ‘int main()’: user.cpp:41:1: warning: this ‘for’ clause does not guard... [-Wmisleading-indentation] for(j=1;j<=m;j++) ^~~ user.cpp:55:5: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘for’ fprintf(g,"%d",s); ^~~~~~~ user.cpp:10:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&n,&m); ^ user.cpp:13:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&a[i][j]); ^