1 #include int main() { double x; while(scanf("%lf",&x) == 1) { if(x == 0) printf("0\n"); else if(x>0) printf("%lf\n",2*x+1); else printf("%lf\n",1/x); } return 0; } 2 #include int s[13] = {0,31,28,31,30,31,30,31,31,30,31,30,31}; int main() { int y,m,d,i,sum; while(scanf("%d %d %d",&y,&m,&d) == 3) { sum = 0; for(i = 1;i2) sum ++; printf("%d\n",sum); } return 0; } 3 #include int f(int n) { if(n == 1) return 1; else return n*f(n-1); } int main() { printf("%d\n",f(9)-f(7)+f(5)+f(3)); return 0; }
追问你在干嘛?这是高数题。╮(﹀_﹀)╭