Compilare: main.cpp: In function 'int main()': main.cpp:10:1: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(i=1;i<=m;i++) for(j=1;j<=n;j++) fscanf(fi,"%d",&a[i][j]); fclose(fi); ^~~ main.cpp:10:63: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' for(i=1;i<=m;i++) for(j=1;j<=n;j++) fscanf(fi,"%d",&a[i][j]); fclose(fi); ^~~~~~ main.cpp:9:31: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d %d %d",&m,&n,&k); ^ main.cpp:10:61: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] for(i=1;i<=m;i++) for(j=1;j<=n;j++) fscanf(fi,"%d",&a[i][j]); fclose(fi); ^ main.cpp:18:49: warning: 'np' may be used uninitialized in this function [-Wmaybe-uninitialized] if(s<min) {min=s; np=1;} else if(s==min) np++; } ^