Compilare: main.c:101:5: warning: conflicting types for built-in function 'pow' int pow(int *A, int *B, int *C, int n) { ^~~ main.c: In function 'pow': main.c:107:9: warning: 'return' with no value, in function returning non-void return; ^~~~~~ main.c:101:5: note: declared here int pow(int *A, int *B, int *C, int n) { ^~~ main.c: In function 'put': main.c:63:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ main.c: In function 'prod': main.c:95:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ main.c: In function 'main': main.c:161:5: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("blas.in", "r", stdin); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:163:5: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("blas.out", "w", stdout); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:169:5: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%i", &t); ^~~~~~~~~~~~~~~ main.c:175:9: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%i", &n); ^~~~~~~~~~~~~~~