prepare (1/3): 
finished

make (2/3): 
gcc -O -g -c main.c -o main.o
main.c: In function 'main':
main.c:115:5: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&eNum);
     ^~~~~~~~~~~~~~~~~
main.c:116:5: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&vNum);
     ^~~~~~~~~~~~~~~~~
main.c:131:9: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &v1);
         ^~~~~~~~~~~~~~~~
main.c:132:9: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &v2);
         ^~~~~~~~~~~~~~~~
main.c:133:9: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &w);
         ^~~~~~~~~~~~~~~
gcc main.o -o main
finished

clean (3/3): 
finished

all task finished, build successfully