#include<stdio.h>
#include<stdlib.h>
#include<time.h>

float tjcs(int);

int main ()
{
    int totalnumbers;
    float percentage;
    int totals;
    int i,j;

    printf("\nPlease enter the totalnumbers:");
    scanf("%f",&totalnumbers);
    printf("\nPlease enter the totals:");
    scanf("%d",&totals);
    for (j=1;j<=totals;j++)
    {
        percentage=tjcs(totalnumbers);
        printf("The percentage of %d is %f",j,percentage);
    }
}
float tjcs(int totalnumbers)
{
    int randvalue;
    int total=0;
    int i;
    float percentage;

    srand(time(NULL));

    for (i=1;i<=totalnumbers;i++)
    {
        randvalue=1+(int)rand() % 100;
        if(randvalue>50)
        total++;
    }
    percentage=total/totalnumbers;
    return(percentage);
}
此程序是本人所编求在有totals种可能，且每种可能性均相同的概率事件中，连续模拟实验totalnumbers次时，每种可能的概率。

但运行时出现问题，求解答是何原因。

主要是数据类型不匹配问题。int型与float型的混合运算要注意。
干脆全部都改用float型……
修改后的代码如下，主要是数据类型的修改：
#include<stdio.h>
#include<stdlib.h>
#include<time.h>

float tjcs(float);

int main ()
{
    float totalnumbers;
    float percentage;
    float totals;
    int i,j;

    printf("\nPlease enter the totalnumbers:");
    scanf("%f",&totalnumbers);
    printf("\nPlease enter the totals:");
    scanf("%f",&totals);
    for (j=1;j<=totals;j++)
    {
        percentage=tjcs(totalnumbers);
        printf("The percentage of %d is %f\n",j,percentage);//记得换行啊~
    }
}
float tjcs(float totalnumbers)
{
    int randvalue;
    int total=0;
    int i;
    float percentage;

    srand(time(NULL));

    for (i=1;i<=totalnumbers;i++)
    {
        randvalue=1+(int)rand() % 100;
        if(randvalue>50)
        total++;
    }
    percentage=total/totalnumbers;
    return(percentage);
}

你给出的程序在调试时出现了这些问题，不知道是何原因，求指教，是否是我编译器的问题，我使用的是code::block。

#include<stdio.h>
 #include<stdlib.h>
 #include<time.h>
 

 float tjcs(int);

 int main ()
 {   srand(time(NULL));   //随机函数种子放到main不然每次的种子都一样
      int totalnumbers;
     float percentage;
     int totals;
     int i,j;

     printf("\nPlease enter the totalnumbers:");
     scanf("%d",&totalnumbers);                             //%d
     printf("\nPlease enter the totals:");
     scanf("%d",&totals);
     for (j=1;j<=totals;j++)
     {
         percentage=tjcs(totalnumbers);
         printf("The percentage of %d is %f\n",j,percentage);
     }
 }
 float tjcs(int totalnumbers)
 {
     int randvalue;
     int total=0;
     int i;
     float percentage;

   
     for (i=1;i<=totalnumbers;i++)
     {
         randvalue=1+(int)rand() % 100;
         if(randvalue>50)
         total++;
     }
     percentage=1.0*total/totalnumbers;     //这里1.0* 强制转换int 转换为float
     return(percentage);
 }

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