include

include

include

include

int main() {

char s[100];
int freq[10] = {0};
scanf("%s",s);
for(int i = 0; s[i] != '\0'; i++){
    if(s[i] >= '0' && s[i] <= '9'){
        freq[s[i]-'0']++;
    }
}
for(int i = 0; i<10; i++){
    printf("%d",freq[i]);
}
return 0;

}

Here is Digit Frequency Solution in c - https://programmingoneonone.com/hackerrank-digit-frequency-solution-in-c.html

include

include

include

include

int main() {

/* Enter your code here. Read input from STDIN. Print output to STDOUT */  
char s[1000];
int freq[10] = {0}; 

scanf("%[^\n]", s); 
for (int i = 0; i < strlen(s); i++) {
    if (s[i] >= '0' && s[i] <= '9') {
        freq[s[i] - '0']++;
    }
}

for (int i = 0; i < 10; i++) {
    printf("%d ", freq[i]);
}  
return 0;

}

int main() {

char *s;
int i, NumberCounter[10] = {0,0,0,0,0,0,0,0,0};
s = malloc(1024 * sizeof(char));
scanf("%[^\n]", s);


for (i=0;s[i]!='\0';i++)
{            
  if (isdigit(s[i]))              
     ++NumberCounter[s[i]-'0'];                    
}

for (i=0; i<10;i++)
  printf ("%d ", NumberCounter[i]);

return 0; }

used the longest method possible😁😁

include

include

include

include

include

int main() {

/* Enter your code here. Read input from STDIN. Print output to STDOUT */  
char str[1000];  
scanf("%s",str);
int a=0,b=0,c=0,d=0,e=0,f=0,g=0,h=0,m=0,j=0;
for(int i=0;i<strlen(str);i++){
    if (isdigit(str[i])){
        if (str[i]=='0'){
            a++;
        }
        if (str[i]=='1') {
            b++;
        }
        if (str[i]=='2'){
            c++;
        }
        if (str[i]=='3'){
            d++;
        }
        if (str[i]=='4'){
            e++;
        }
        if (str[i]=='5'){
            f++;
        }if (str[i]=='6'){
            g++;
        }if (str[i]=='7'){
            h++;
        }if (str[i]=='8'){
            m++;
        }if (str[i]=='9'){
            j++;
    }
}
}
printf("%d %d %d %d ",a,b,c,d);
printf("%d %d %d %d %d %d",e,f,g,h,m,j);
return 0;

}