求以下三数的和,保留2位小数 1~a之和 1~b的平方和 1~c的倒数和
最好用到函数，我是刚学函数



#include <stdio.h>
#include <stdlib.h>
int calnumA(int a);
int calnumB(int b);
int calnumC(int c);
/* run this program using the console pauser or add your own getch, system("pause") or input loop */

int main(int argc, char *argv[]) {
   float a,b,c;
    scanf("%f%f%f",&a,&b,&c);
    printf("%.2f",calnumA(a)+calnumB(b)+calnumC(c));
    return 0;
}
int calnumA(int a){
    int i,s=0;
    for(i=1;i<=a;i++){
        s=s+i;
        return s;
    }
}
int calnumB(int b){
    int i,s=0;
    for(i=1;i<=b;i++){
    s=s+i*i;
    return s;   
    }
}
int calnumC(int c){
    int i;
    float s=0;
    for(i=1;i<=c;i++){
        s=s+1.00/i;
        return s;
    }
}

有编译告警的啊

#include <stdio.h>
#include <stdlib.h>
int calnumA(int a);
int calnumB(int b);
float calnumC(int c);
/* run this program using the console pauser or add your own getch, system("pause") or input loop */

int main(int argc, char *argv[]) {
    float a, b, c;
    scanf("%f%f%f", &a, &b, &c);
    printf("%.2f", calnumA(a) + calnumB(b) + calnumC(c));
    return 0;
}
int calnumA(int a) {
    int i, s = 0;
    for (i = 1; i <= a; i++) {
        s = s + i;
        
    }
    return s;
}
int calnumB(int b) {
    int i, s = 0;
    for (i = 1; i <= b; i++) {
        s = s + i*i;
        
    }
    return s;
}
float calnumC(int c) {
    int i;
    float s = 0;
    for (i = 1; i <= c; i++) {
        s = s + 1.00 / i;
        
    }
    return s;
}

保持数据类型一致
 int  a,b,c;
     scanf("%d%d%d",&a,&b,&c);
     printf("%.2f",float(calnumA(a)+calnumB(b)+calnumC(c)));