三角形

#include
     
      int main(){  printf("*\n");  printf("**\n");  printf("***\n");  printf("****\n");  printf("*****\n");  printf("******\n");  printf("*******\n");  printf("********\n");  printf("*********\n");  printf("**********\n");  return 0;}
     

10*10矩形

#include
     
      int main(){  printf("**********\n");  printf("**********\n");  printf("**********\n");  printf("**********\n");  printf("**********\n");  printf("**********\n");  printf("**********\n");  printf("**********\n");  printf("**********\n");  printf("**********\n");  return 0;}
     

倒三角形

#include
     
      int main(){  printf("* * * * * * * * * *\n");  printf(" * * * * * * * * *\n");  printf("  * * * * * * * *\n");  printf("   * * * * * * * \n");  printf("    * * * * * * \n");  printf("     * * * * * \n");  printf("      * * * * \n");  printf("       * * * \n");  printf("        * *\n");  printf("         *\n");  return 0;}
     

输入成绩

#include
     
      int main (){    char score;    printf("请输入等级");    scanf("%c",&score);    switch(score)    {        case 'A':                  printf("90-100");                  break;        case 'B':                  printf("80-89");                  break;        case 'C':                  printf("70-79");                  break;            case 'D':                  printf("60-69");                  break;        case 'E':                  printf("0-59");                  break;                                        }    return 0;}
     

华氏度

#include
     
      int main(){    int FFF=100;    int CCC=5*(FFF-32)/9;    printf("CCC=%d",CCC);    return 0; }
     

重力加速度

#include
     
      int main(){    int g=10;    int t=3;    int h=0.5*g*t*t;    printf("h=%d",h);    return 0; }
     

152个位十位百位

#include
     
      int main(){    int x=152;    int a=x/100;    int b=x%100/10;    int c=x%10;    printf("百位=%d,十位=%d,个位=%d",a,b,c);    return 0;}
     

分段函数

#include
     
      #include
      
       int main(){   double x;   double y;   scanf("%lf",&x);   if (x>=0)           y=sqrt(x);    else        y=pow(x+1,2)+2*x+1/x;        printf("f(x)=%lf",y);    return 0; }
      
     

年利率

#include
     
      #include
      
       int main(){    double money;    double year;        double rate;    double interest;    double a;    scanf("%lf %lf %lf",&money,&year,&rate);    a=pow(1+rate,year);    interest=money*a-money;     printf("interest=%lf",interest);    return 0;}
      
     

电量

#include
     
      int main(){    double x;    double y;    printf("请输入电量x：");    scanf("%lf",&x);    if(x<=50)        y=x*0.53;    else        y=50*0.53+(x-50)*0.05;    printf("%lf",y);    return 0; }
     

感谢助教老师和丛同学对我的帮助，面对我很弱智的问题还在悉心解答

ps.年利率太难啦