Compilare: main.cpp: In function 'int main()': main.cpp:12:9: warning: unused variable 'ip' [-Wunused-variable] int ip , jp , iip , jjp; ^~ main.cpp:12:14: warning: unused variable 'jp' [-Wunused-variable] int ip , jp , iip , jjp; ^~ main.cpp:12:19: warning: unused variable 'iip' [-Wunused-variable] int ip , jp , iip , jjp; ^~~ main.cpp:12:25: warning: unused variable 'jjp' [-Wunused-variable] int ip , jp , iip , jjp; ^~~ main.cpp:13:41: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d%d%d",&aa,&b,&c,&d); ^ main.cpp:11:24: warning: 'p4' may be used uninitialized in this function [-Wmaybe-uninitialized] int p1 , p2 , p3 , p4 , found = 0 , ic , jc; ^~ main.cpp:11:19: warning: 'p3' may be used uninitialized in this function [-Wmaybe-uninitialized] int p1 , p2 , p3 , p4 , found = 0 , ic , jc; ^~ main.cpp:11:14: warning: 'p2' may be used uninitialized in this function [-Wmaybe-uninitialized] int p1 , p2 , p3 , p4 , found = 0 , ic , jc; ^~ main.cpp:191:23: warning: 'jjj' may be used uninitialized in this function [-Wmaybe-uninitialized] jjj ++; ^ main.cpp:190:29: warning: 'iii' may be used uninitialized in this function [-Wmaybe-uninitialized] a[iii][jjj] = nr; ~~~~~~~~~~~~^~~~ main.cpp:167:22: warning: 'jj' may be used uninitialized in this function [-Wmaybe-uninitialized] jj ++; ^ main.cpp:166:27: warning: 'ii' may be used uninitialized in this function [-Wmaybe-uninitialized] a[ii][jj] = nr; ~~~~~~~~~~^~~~ main.cpp:141:25: warning: 'j' may be used uninitialized in this function [-Wmaybe-uninitialized] a[i][j] = nr; ~~~~~~~~^~~~ main.cpp:142:21: warning: 'i' may be used uninitialized in this function [-Wmaybe-uninitialized] i --; ^ main.cpp:122:21: warning: 'd3' may be used uninitialized in this function [-Wmaybe-uninitialized] while (d1 || d2 || d3){ ~~~~~~~~~^~~~~ main.cpp:122:21: warning: 'd2' may be used uninitialized in this function [-Wmaybe-uninitialized] main.cpp:122:21: warning: 'd1' may be used uninitialized in this function [-Wmaybe-uninitialized]