0_0_13091539_17929.cpp: In function 'int main()': 0_0_13091539_17929.cpp:21:9: error: 'i' was not declared in this scope for(i=0;i<m;i++) ^ 0_0_13091539_17929.cpp:24:10: error: 'j' was not declared in this scope for(j=0;j<n;j++) ^