$ gcc -Wall -Wextra -pedantic -std=c99 -O2 eigenvalue.c -o ../build/eigenvalue
eigenvalue.c: In function ‘main’:
eigenvalue.c:69:26: warning: ‘largest_index’ may be used uninitialized in this function [-Wmaybe-uninitialized]
lambda_new = fabs(x_new[largest_index]);
$ gcc -Wall -Wextra -pedantic -std=c99 -O2 eigenvalue.c -o ../build/eigenvalue eigenvalue.c: In function ‘main’: eigenvalue.c:69:26: warning: ‘largest_index’ may be used uninitialized in this function [-Wmaybe-uninitialized] lambda_new = fabs(x_new[largest_index]);