prepare (1/3): 
finished

make (2/3): 
gcc -g -Wall -O2 p_main.c p_graph.c prim.c -o main
p_main.c: In function 'main':
p_main.c:7:5: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d", &ed_size, &ve_size);
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
p_graph.c: In function 'graph_read':
p_graph.c:29:5: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d %d", &u_index, &v_index, &weight);
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
finished

clean (3/3): 
finished

all task finished, build successfully